Fits most cassette lockrings including Shimano®, SRAM®, Sun Tour®, Chris King® and Sun Race®. (Note: You must hold cassette cogs with chain whip tool such as the Park Tool Sprocket Remover SR-1 or SR-2). Heat treated alloy tool steel, one inch base fits wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts. Always use a skewer or axle nut to hold remover firmly in place.