Park Tool FR-5.2H - Cassette Lockring Tool with Handle 60x40mm The Big Blue Book is

The Big Blue Book is the perfect reference guide for nearly any level mechanic and every bike

Made for the rigors of everyday shop use

Charles Daly pumps/semi-automatics

and reducing pain while riding

Park Tool FR-5.2H - Cassette Lockring Tool with Handle 60x40mm The Big Blue Book isFast and 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, SunRace, SunTour, Chris King and others (23. 5mm diameter). Fits some disc brake lockrings from Shimano and others. Durable electroless nickel finish. Removable threaded handle for quick and easy replacement of worn or damaged head (Replacement Head: #2301). Made in the USA