Made from heat-treated S2 tool steel for the ultimate in strength and long-lasting performance. Professional quality, precision sized for the perfect fit. Fits all Shimano«, Sram«, SunRace«, SunTour«, Chris King«, and other HG standard cassette lockrings and Shimano« disc brake lockrings. Designed to work with Pedro's snap-channel Pro Socket Handle, a 24mm socket or wrench, or in a bench vise.