- Slim design allows fitment on frames and forks with tight clearance - Internal splines fit cassette lockring tools - Secure Center Lock rotors on Center Lock hubs - Compatible with 12mm thru-axles and QR - Made with 7075-T6 aluminum and machined at Wolf Tooth in Minnesota, USA - Can be installed with Wolf Tooth Pack Wrench. Torque to 40Nm. Not compatible with six-bolt rotors and hubs. Includes washer