Fast & convenient to use Design allows cassette lockring removal without removing the nut on most quick release skewers Fits 12-spline cassette lockrings from Shimano SRAM Sun Race Sun Tour Chris King & others (23.5mm diameter) Fits some disc brake lockrings from Shimano & others Durable electroless nickel finish Removable threaded handle for quick & easy replacement of worn or damaged head (Replacement Head: 2301) Made in the USA & covered by Park Tools legendary limited lifetime warranty