The FR-5.2G is designed to fit the most common tool fitting found on 7-to-12 speed cassette lockrings, including models made by Shimano®, SRAM®, and others. Also fits disc brake lockrings and lockring adapters with 12 internal splines. Thin wall construction allows use without removal of cones and locknuts. The 1" hexagonal base can be used in conjunction with a socket, wrench, or bench vise. Heat-treated alloy tool steel construction for a lifetime of use.