Part of a comprehensive range of freewheel and bottom bracket removal tools.Key Features:Oversized centre hole and thin wall design allows use without removal of cones and locknuts,Investment cast and heat-treated for strength and durability,One-inch base fits end of SR-1, FRW-1 Park tools or simply an adjustable wrench or bench vice,High strength tool steel,Fits 12-tooth internally-splined Record, Chorus, and Athena cartridge bottom brackets, and Campagnolo cassette hub lockrings,Compatible with 11-speed lockrings.