Tools

Park's Compact Crank Puller is used to remove Shimano Octalink, ISIS Drive and square-taper cranksets. It includes 2 rotating tips (16.3 and 11.3mm) to make the job easy. This is a great tool for your travel and home tool kit.

Cleans bicycle chain quickly, easily, and effectively — without the hassle and mess of removing the chain from the bike. The Cyclone uses a large solvent reservoir, hundreds of rotating bristles, and a two-step cleaning process to get chains really clean, improve shifting performance, and extend the life of the chain and other expensive drivetrain parts. - Works with all multi-speed bikes (5, 6, 7, 8, 9, 10, 11, and 12-speed) as well as some single-speed models and e-bikes - Strong magnet at the bottom of the fluid reservoir holds metallic particles scrubbed from the chain - Special wicking sponge draws solvent from the chain as it exits, minimizing drips and mess - Sturdy handle makes the Cyclone easy to use and control - Holds 2 fluid ounces (59ml) of solvent

Park's Hex Wrench Set offers all the popular Allen wrenches (1.5, 2, 2.5, 3, 4, 5 and 6mm) in a convenient fold-up unit. The tool tips are chamfered for a positive grip and the one-piece fiber-reinforced-resin handle is light, comfortable, slip resistant and 40% stronger than steel.

To prevent poor shifting and uneven drivetrain wear, most manufacturers recommend chain replacement at or before 1% stretch. Now you can quickly and accurately determine the wear and stretch of any chain with Park's Chain Checker. Simply insert the Chain Checker’s pins into 2 links, press the swingarm gauge tight, and then check the gauge window for an accurate reading!

A professional quality shop chain tool that works on 5-speed to 12-speed Road and Mountain Bike derailleur chains*, including SRAM AXS 12 speed, as well as 1/8-inch and 3/16-inch chains. The CT-3.3 features an adjustable locating shelf so it works on any width chain to remove and install chain rivets. Built to last and easy to use, the CT-3.3 features a comfortable handle, investment cast steel body and replaceable driving pin (#CTP). *The CT-3.3 will install, but not peen, Campagnolo 11 and 12-speed chain rivets. - Comfortable T-handle - Replaceable driving pin (CTP) - Investment cast steel body - Adjustable locating shelf

Park’s Professional Cable And Housing Cutter is specifically for use on derailleur and brake cables and housing. It even makes quick work of hard-to-cut shift-cable housing. Its cold-forged, heat-treated-steel handles won't bend and its precision-ground jaws cut perfectly every time. Its dual-density molded grips are specially contoured for superior comfort and control. Plus, there’s a built-in cable-end crimper and a forming hole for reforming housing ends.

Park's BBT-18 is a heavy duty, investment cast tool for installing and removing all Shimano, ISIS Drive, and ISIS Overdrive 8-notch bottom bracket cups.

• Updated to be stronger, smoother, and more versatile • Features a new material and redesigned tip for easier entry into just about any tire, including tubeless • The unique design lifts the tire away from the rim and features a spoke hook to use when multiple levers are needed • This set includes 3 tire levers

A favorite of shop mechanics for over 30 year's, Park's CCP-22 Crank Puller removes crankarms that feature square tapers, and those that fit on Power Drive and Power Spline bottom bracket interfaces. The long, comfortable, built-in handle and fine thread provide the leverage needed to remove even the tightest crankarms. And, there's a rotating tip to ensure smooth operation and long life.

Park's Gear Clean Brush has a handle on one end with a curved, serrated edge perfect for cleaning between cassette cogs. The other end's tough nylon bristles are ideal for cleaning the derailleurs, chain and other drivetrain parts to keep them clean and prevent premature wear. It also works great on brakes and other components that collect dirt and grime. The GearClean easily fits in a toolbox or pack.

Park's Heavy-Duty Tire Levers handle the toughest tire-and-rim combinations including difficult downhill and freestyle tires. Their specially designed tips engage the tire bead so it can be removed with just two levers. Plus, these beefy, forged-steel levers are a full 8-inches long for superior leverage.

Many chains use a master link that allows the chain to be installed and removed by hand. While master links don't require traditional chain tools, over time, dirt and corrosion can make it difficult to separate them by hand. Park's Master Link Pliers make removing and installing these master links quick and easy. Simply insert the specially sized jaws into the link and squeeze the vinyl-coated handles!

A great way to hold small parts, tools and components during a repair, Park Tool's Benchtop Overhaul Mat features multiple small pockets and one large work area. It's perfect for suspension work or to organize parts for installation. • Made of a rubber-like PVC • Cleans easily and looks great on any bench • Measures: 14.7” x 7” (38cm x 18cm)

Park's Valve Core Tool is great for tightening, removing and installing Schrader and Presta valve cores (the cores are inside the valve), and also Presta valve extenders that have 5mm wrench flats. It's a handy tool to save a tube when all that's wrong is a broken valve, and it also lets you remove valves to easily insert sealant.

Park's I-Beam Mini Fold-Up Hex Wrench/Screwdriver/Torx Set with Chain Tool includes 1.5, 2, 2.5, 3, 4, 5, and 6mm Allen wrenches, a socket 8mm Allen, a regular screwdriver, a T25 Torx tool (for disc-rotor bolts), a tire lever, spoke wrenches and a chain tool. The I-Beam conveniently fits in pockets and packs, too.

A puncture in your tubeless tire doesn't have to be a death sentence for your ride. This handy carry-along tool repairs small punctures and cuts in tubeless bicycle tires without removing the tire from the rim, getting you back on the trail in no time. The TPT-1 easily plugs the hole by inserting one of the 5 included vulcanized rubber plugs into the puncture. This shrinks the puncture down to a manageable size, allowing the tubeless sealant to do its job and reestablish a seal. The unique sliding plug retainer holds the plug in place and prevents it from being pulled back out as the tool is removed. Everything is stored in a compact package that fits easily in a saddlebag or backpack pocket. - Includes 5 vulcanized rubber plugs (refills available — part #2370K) - Dimensions: 89 x 27 x 40 mm (3.5" x 1.1" x 1.6") - Weight: 79 grams (2.8 oz.) with plugs NOTE: Intended for tubeless bicycle tires using sealant only. Not compatible with inner tube systems.

Choose the perfect tool for the job with Park's P-Handled Hex Wrenches. These top-shelf Allen wrenches come with offset handles made from durable nylon in a comfortable, ergonomic design. They are made of chrome vanadium for exceptional durability. The long shafts feature Bondhus heads for accessing hard-to-reach bolts and the short ends are chamfered for extra grip and high-torque applications.

Park's Open Ended Metric Wrench is a special thin wrench with 8 and 10mm openings perfect for adjusting the thin pivot-bolt nuts on sidepull brakes (and other hex nuts on your bicycle). This handy brake tool is made of durable tool steel that's nickel plated for corrosion resistance.

Shop quality, L-shaped, high-torque industrial steel hex wrenches with a ball end on the long arm and stubby short arms specifically for reaching bolt heads in tight spaces (like caliper mounting bolts, chainring bolts, etc.). Other features include chamfered tips, tight tolerances, and a handy portable tool organizer/holder. 1.5, 2, 2.5, 3, 4, 5, and 6mm hexes.

Park Tool's Derailleur Clutch Wrench is a small, thin wrench with 5.5mm and 3mm openings designed to fit the rear derailleur clutch tension adjuster on Shimano XT, SLX, Deore, Saint and Zee rear Shadow Plus (+) derailleurs and all previous Shadow Plus models.

The BK-UK includes six new and revised parts for the Park Tool BKD-1 and BKM-1 Hydraulic Brake Bleed Kits, allowing for compatibility with the latest brake models from popular manufacturers. Includes: - Part #2600A (x2) — M4 x 0.8 adaptor for use with SRAM DB8, Trick Stuff, and Campagnolo mineral oil brake systems - Part #2588.2 — Thin-walled hose compression sleeve for internal bleed nipples, such as those found on Shimano mineral oil brake systems - Part #2574A — Hose assembly with integrated fitting for bleed nipples such as those found on Shimano mineral oil brake systems - Part #2615-2 (x2) — 11 mm bleed blocks for use with Hayes DOT brake systems All parts also available individually. NOTE: The seals on each part are designed for one type of fluid — DOT fluid or mineral oil — and should be used only on the systems they were intended for. DOT fluid and mineral oil should never be mixed in the brake system or in their respective service tools. Cross-contamination of brake fluid may cause seal failure which may result in brake failure.

The RTP-1 combines two ride-saving tools — the MTB-5 Multi-Tool and TPT-1 Tubeless Tire Plug Tool — into one ultra-portable package. The included tool holder securely holds both tools without adding excess weight, and can be mounted or strapped to most bike frames. The MTB-5 packs 16 functions into one slim, tough folding multi-tool, making it the ideal companion for any trailside adjustment or emergency fix. Features a full set of hex wrenches and screwdrivers, a T25 Torx-compatible driver, and five specialty tools to aid in common on-the-ride repairs. The TPT-1 is a handy carry-along tool for repairing small punctures and cuts in tubeless bicycle tires without removing the tire from the rim, getting you back on the trail in no time. The TPT-1 easily plugs the hole by inserting one of the 5 included vulcanized rubber plugs into the puncture. This shrinks the puncture down to a manageable size, allowing the tubeless sealant to do its job and reestablish a seal. The unique sliding plug retainer holds the plug in place and prevents it from being pulled back out as the tool is removed. Everything is stored in a compact package that fits easily in a saddlebag or backpack pocket. MTB-5 Includes the following: - 2, 2.5, 3, 4, 5, 6 & 8 mm hex wrenches - T25 Torx-compatible driver - Philips #2 cross tip & flat head screwdrivers - Chain tool (5 to 12 speed compatible)* - Spoke wrenches (equivalent to SW-0 and SW-2) - Presta valve core removal tool - Disc brake rotor truing tool - Disc brake pad spreader *The MTB-5 will not peen Campagnolo 11, 12 or 13 speed chain rivets - Dimensions: 3.1" x 1.8" x 0.8" (79 x 45 x 20 mm) - Weight: 6.9 oz. (195 g) - Replaceable chain tool pin (Part #985-1) TPT-1 - Includes 5 vulcanized rubber plugs (refills available - part #2370K) - Dimensions: 89 x 27 x 40 mm (3.5" x 1.1" x 1.6") - Weight: 79 grams (2.8 oz.) with plugs NOTE: Intended for tubeless bicycle tires using sealant only. Not compatible with inner tube systems.

A precision CNC-machined aluminum tool for the installation and removal of select components with 16-notch tool fittings, including bottom brackets, center lock disc brakes, and e-bike motor lockrings. Manufactured in-house by Park Tool, anodized for easy identification and featuring a ratchet/torque wrench-compatible 3/8" drive. The BBT-69.4 features integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately). The BBT-RS uses an adjustable spring-based tension system to apply consistent, adjustable pressure to the tool, ensuring full engagement with the tool fitting and preventing slippage. Fits 16-notch tool fittings with a major diameter (outside of notches) of 44–45 mm and a minor diameter (inside of notches) of 42.7 mm, including: - Shimano BB80, BB5700, XT BB70, BB51, and previous external bearing threaded bottom bracket cups - Threaded bottom bracket cups from Campagnolo, Chris King, FSA MegaExo, Hope, SRAM/Truvativ GXP, Race Face X-type, Surly, Wheels, Fulcrum, and others - Center lock disc brake rotor lockrings - Bafang BBSH, BBS02 mid-drive motor lockrings - 3/8" drive fitting

Made from tough steel and reinforced with extra material at the highly stressed wrench openings, Park’s shop-quality Pedal Wrench is built to easily install and remove pedals, and to last and last. It has 15mm and 9/16-inch precision openings to fit all pedals. And it boasts a long, round, vinyl-coated handle that won’t dig into your hand and provides optimum leverage. There's even a hole in the end of the wrench for hanging it on your toolboard.

Park's Needle Nose Pliers are professional quality, 6-inches long, and made from forged, heat-treated chromoly steel. For ease of use they have a hidden spring, cutting jaws and 5 different gripping and crimping areas. Plus, they have soft-touch, dual-density handles for an excellent grip.

Park's Dial Indicator Gauge Set mounts to their TS-2 or TS-2.2 Truing Stand (sold separately). The set makes it easy to view and correct a wheel's lateral and radial run-out within a tolerance of .01mm. Compared to going by the gap between the truing stand pointer and rim, having gauges that put a number on the clearance makes wheel truing easier and more accurate.

Park's Crank and Bottom Bracket Wrench is perfect for working on old-style bottom brackets. The HCW-4 utilizes a 36mm box-end head and a pin spanner for your bottom bracket removal and installation needs.

Park’s Shop Apron protects your clothes and provides large pockets to hold frequently needed tools. It’s made of heavy-duty, 7-ounce poly/cotton twill for comfort and durability.

Park's Shop Screwdrivers are pro-quality tools featuring durable and precise heat-treated chrome-vanadium tips and shafts and dual-density handles for an excellent grip.

The 1729-TA Sliding Thru Axle Adaptor is designed to allow any Park Tool PRS-20, PRS-21 or PRS-23 Repair Stand to accept 12mm and 15mm thru axle wheeled bikes.

Park Tool's Crown Race Cutter Adaptor is used in conjunction with the CRC-1 Crown Race Cutting Tool (sold separately) to machine 39.8mm crown race seats (1.5” standard) on tapered forks with 1-1/8” steerer tubes. It includes a precision-machined adaptor body and a 39.8mm high-speed steel crown race cutter. The CRC-15 will work on forks with a maximum 1.5-inch taper of 4.25 inches.

Accurately gauge the straightness of disc brake rotors while the wheel is mounted in a TS-2.2 or TS-2 Professional Wheel Truing Stand (each sold separately). Park Tool's Rotor Truing Gauge features an infinitely adjustable, finely threaded indicator gauge. It works with any diameter brake rotor.

The BBT-4 is made for the installation and removal of 6-notch SC-S and AC-H cartridge cups used on sealed cartridge bottom brackets. These bottom brackets have six notches around the outside of each cup. The handle of the BBT-4 is vinyl coated for comfort. The major diameter of the tool is nominally 44mm, and the minor diameter 38mm. The BBT-4 is compatible with the following sealed cartridge bottom brackets: • Campagnolo Veloce • Xenon • Mirage • Daytona • Avanti

The BBT-29 is a double-ended bottom bracket wrench designed to fit 16-notch bearing cups with an outside diameter of 39mm (e.g. Shimano Dura-Ace 9000 series and XTR 980 series) as well as 16-notch bearing cups with an outside diameter of 48.5mm (e.g. FSA MegaEvo).

The MT-10, 20, 30 and 40 are high quality folding take-along tools that feature forged aluminum side plates, a mix of hardened and plated tools, and smooth ergonomic operation.

Upgrades the DT-5 to the DT-5.2. - Four telescoping axle adaptors - Two stand off studs for Flat Mount alignment - 12mm front fork thru axle sleeve

The HBH-3 securely holds handlebars in place on any bike in any position while in a repair stand. It's useful for brake bleeding, cable and housing routing, lever adjustment, or any scenario where you want to prevent the handlebars from rotating, including storage or working with the bike rotated upwards. With its articulating clamps and adjustable straps, the HBH-3 can easily be attached in a wide variety of positions onto almost any handlebar, seatpost, frame, fork, or repair stand. Anodized aluminum construction with soft rubber straps. - Straps install onto any round tube from 12mm to 60mm (0.5" to 2.4"), as well as most irregular and aero-shaped tubing found on bicycles - Rotating articulating clamps allow for secure installation onto virtually any bicycle in a wide range of positions - Usable extension length of 18" to 32" (45cm to 81cm) - Collapses and folds to 17" (43cm) for storage

Disc brake rotors should be regularly checked for wear to ensure safety and performance. The DCA-1 installs onto most digital, dial, or vernier calipers (including the Park Tool DC-1) and features protruding contact points that allow measurement of the center of the braking surface, bypassing the unworn edge to ensure an accurate measurement. The conical end points of the DCA-1 can be used to measure center-to-center distances of bolt holes for calculating bolt circle diameter (BCD) of chainrings and cranks. - Compatible with most standard vernier, dial, and digital caliper designs

Made for the rigors of everyday shop use, this adjustable tap handle fits many common bicycle taps. • Fits most metric taps from M1.6-M8 • Fits most standard taps from #0-5/16”

The 791 Reamer Set reamer is used on the PF30 frame shells. The reamer is sized at 45.94mm. The 791 Reamer Set must used with the HTR-1 Head Tube Reamer and Facer, a 750.2 Centering Cone and the 690-XL Facer. The 791 set also includes a pilot that allows a facing-only option of the PF30 frame shell.

Professional quality ring plier made from forged, heat-treated cro-moly steel with a return spring and vinyl dipped grips. The RP-5 has 1.7mm tips on straight blades for small, internal snap rings. The tips open from 22mm to 0 (tips touching).

World-famous Park Tool quality wrapped up in a combination metric wrench. Features both open and 12-point two-way ratcheting box ends. Forged from chrome vanadium steel, chrome plated, meticulously polished, then center dipped in Park Tool blue vinyl for a positive grip. Strong, comfortable, and beautiful!

A dirty drivetrain causes poor shifting and unnecessary wear to expensive parts. The Chain Gang contains everything needed to quickly and easily clean the chain, freewheel cogs, and chainrings. The Chain Gang includes: - CM-5.3 Cyclone Chain Scrubber - GSC-1 GearClean Brush - 8 oz. bottle of Bio ChainBrite The CG-2.4 works on nearly any bike, including multi-speed, single-speed, and e-bikes.

Shop-quality, adjustable torque driver that limits torque applied to fasteners, preventing over-tightening and damage to lightweight components. The ATD-1.2 features all-metal internal construction with a comfortable, ergonomic composite molded grip. Each tool is assembled and calibrated at Park Tool's factory in Minnesota.

Park Tool's Pump Rebuild Kit contains one #1081 head as well as one #1087 plunger gasket for their PFP-3, PFP-6 and PFP-8 floor pumps.

A worn chain shifts poorly and wears sprockets at an accelerated rate. Park Tool's Chain-Wear Indicator is a “go-no go” gauge designed to accurately indicate when a chain reaches .5% and .75%, the points at which most chain manufacturers suggest replacement. The updated CC-3.2 is longer, more accurate and features permanent measurement markings.

Park's AWS-7 features a Y-shaped nylon handle with 4 and 5mm Allen wrenches and a T25 Torx wrench. This convenient 3-in-1 tool keeps commonly used wrenches together and offers an excellent grip as well.

World-famous Park Tool quality wrapped up in a great set of metric combination wrenches. Forged from chrome vanadium steel, chrome plated, meticulously polished, then center dipped in Park Tool blue vinyl for a positive grip.

A professional level tool set designed and built for portability. The EK-3 is perfect for team and event mechanics or the home mechanic who wants the ultimate portable tool kit. Neatly organized in Park Tool's world-famous BX-2.2 Blue Box Tool Case, this tool kit features 56 of their best tools to do hundreds of repair and maintenance tasks. Plus, the bomb-proof Blue Box features pockets, pouches, straps and open space to add more tools and parts! Kit Includes: - ATD-1.2 Adjustable Torque Driver - AWS-1 Three-Way Hex Wrench Set: 4, 5, 6mm - BBT-9 Bottom Bracket Tool for 16-Notch External Bearing Cups - BBT-32 Bottom Bracket Tool for 20 Notch Shimano and ISIS Drive - BO-2 Bottle Opener - CC-4 Chain Checker - CN-10 Professional Cable and Housing Cutter - CNW-2 Chainring Nut Wrench - CP-1.2 Cassette Pliers - CT-3.3 Chain Tool - CWP-7 Compact Universal Crank Puller - DCW-1 Double-Ended Cone Wrench: 13/14mm (2) - DCW-2 Double-Ended Cone Wrench: 15/16mm (2) - DCW-3 Double-Ended Cone Wrench: 17/18mm - DSD-2 Derailleur Screwdriver: Cross Tip - DSD-4 Derailleur Screwdriver: Flat Blade - DT-2 Rotor Truing Fork - FR-5.2H Cassette Lockring Tool with Handle - GSC-1 GearClean Brush - HCW-15 36mm/32mm Headset Wrench - HMR-8 Shop Hammer - HT-8 8mm Hex Tool - HXS-1.2 Hex Wrench Set - LP-7 Utility Pliers - MLP-1.2 Master Link Pliers - MW-8 Metric Wrench: 8mm - MW-9 Metric Wrench: 9mm - MW-10 Metric Wrench: 10mm - PAW-12 12" Adjustable Wrench - PW-4 Professional Pedal Wrench - RR-12 Tape Measure - SW-0 Precision Spoke Wrench: .127" - SW-2 Precision Spoke Wrench: .136" - SZR-1 Shop Scissors - TL-6.2 Steel Core Tire Levers - TWS-1 Torx Compatible Wrench Set

Forged with Chrome Vanadium (CR-v) steel, precision ground, heat-treated, plated and polished. The PAW-6 opens to 24mm and features a laser engraved measurement scale and dipped blue handle for comfort.

The 15-inch SWB-15 is a forged steel breaker bar with a 3/8-inch square drive head that pivots 180º. Features a long, knurled handle, which is extremely useful when extra leverage is needed to remove stubborn fasteners.

A precision CNC-machined aluminum tool for the installation and removal of select threaded bottom brackets with 16-notch tool fittings, including Enduro T47 & PF30 bottom brackets. Manufactured in-house by Park Tool, anodized for easy identification and featuring a ratchet/torque wrench-compatible 3/8" drive. Fits 16-notch bottom bracket tool fittings with a major diameter of 52-54 mm and a minor diameter of 48.8 mm, including: - CeramicSpeed T47/86 - Enduro T47 (30mm and DUB spindles) - Enduro BB30/30a TorqTite (30mm and DUB spindles) - Kogel T47 - SRAM T47 DUB - White Industries T47 - White Industries PF30 Thread-Together

Park's Offset Brake Wrench utilizes a unique design that allows it to reach into tight areas that other wrenches cannot. The OBW-3 features a 14mm wrench on one end and the other end fits into a brake's tension springs to rotate the brake around its bolt for proper alignment. The OBW-4 features 10-, 11-, 12-, and 13-mm opening to fit most models of sidepull brakes.

Park's Cone Wrenches are made of durable tool steel and are nice and thin to fit on the small-clearance cones found on hubs and other bearing assemblies. Plus, they work as regular wrenches, too. They feature Park's special Y heads that put more material where it's needed for excellent durability and strength. Most applications require at least 2 cone wrenches. If you have questions please contact us and we can recommend the correct sizes for your needs.

The Magnetic Parts Bowl is the ideal solution for keeping track of small metal parts. It's 6 inches in diameter and featues an extra-strong magnet so bearings, cones and springs stay put and you don't lose them.

A perfect way to start a bicycle tool collection! A great combination of tools to help a home mechanic clean, adjust, maintain, and do some basic repairs on their bike. The SK-4 includes more than 15 genuine Park Tool products that can perform dozens of tasks and includes a custom Park Tool toolbox with extra room for spare parts and more tools. The SK-4 includes: - AWS-10 Fold-Up Hex Wrench Set - BBB-4 Big Blue Book of Bicycle Repair - CC-3.2 Chain Checker - CN-10 Professional Cable and Housing Cutter - CT-5 Mini ChainBrute Chain Tool - FR-5.2 Cassette Lockring Tool - GSC-1 GearClean Brush - HCW-16.3 Chain Whip/Pedal Wrench - HR-8 8mm Hex Wrench - MLP-1.2 Master Link Pliers - SD-2 Shop Screwdriver: #2 Phillips - SW-7.2 Triple Spoke Wrench - TL-1.2 Tire Lever Set - TWS-3 Torx Compatible 3-Way Wrench

Park's Crank and Bottom Bracket Wrench is perfect for working on old-style bottom brackets. The HCW-5 is a dual-sided lockring hook spanner, featuring a three-prong side and a single hook side for different style lockrings.

Professional quality T-Handle hex wrench built for speed, efficiency, leverage and a perfect fit. - Carefully selected combination of Chrome Vanadium and S-2 tool steels - Unique anodized aluminum Speed Spinner makes running long bolts in and out quick and effortless - Machined, chamfered tips allow easier insertion into hex fittings - Integrated “Strip-Gripper” twisted hex that makes removal of most bolts with stripped or oversized hexes fast and easy - Sliding T-handle creates increased leverage and multiple access positions

Park's versatile Headset Wrench is constructed from hardened, laser-etched steel for the maximum in durability and precision. The HCW-15 is a dual sided wrench that features a 32mm opening on one end and a 36mm opening on the other.

Designed and built to remove and install Shimano direct mount chainring lockrings found on XTR 9120, XT 8120, MT900, and other Shimano direct mount systems. Precisely CNC machined from 6061 aluminum for a perfect fit and to prevent marring expensive parts. - Machined flat face for optimal lockring engagement - For lockrings with 41mm outside diameter and 16 notches - 36mm hex drive to be used with Park Tool TWB-36 Crow Foot and a torque wrench to properly measure torque - 6061 aluminum construction