This Cassette Tool lets you install, remove, and tighten the OneUp Components Threaded Top Cap, as well as service OneUp Rear Hubs and OneUp Aluminum Pedals. It is also compatible with all standard cassette lockrings and Shimano Centerlock disc brake lockrings. Heat-treated steel and a hollow core provides increased durability to this twelve-spline cassette tool. This is a great addition to any toolbox. OneUp Compatibility: Specifically designed to work with the OneUp Components Threaded Top Cap, Rear Hubs, and OneUp Aluminum Pedals. Universal Fit: Compatible with Shimano, SRAM, SunRace, SunTour, and Chris King cassette lockrings, as well as Shimano disc brake lockrings and SRAM 11- and 12-speed cassettes. Hollow Core Design: Allows for use with all axle types. Multiple Tool Options: Works with a 1/2'' ratchet driver, 24mm wrench, or most adjustable wrenches (jaw capacity bigger than 24mm). Note: This tool will also work with select Centerlock disk brake rotors and suspension top-caps. Be sure to refer to the manufacturers specifications if you're not sure.