The Park Tool Freewheel Remover/Bottom Bracket Tool is made from heat treated alloy tool steel with a one inch base which fits wrench or bench vice. Thin wall construction allows use without removal of cones and locknuts. Park Tool Freewheel Remover/Bottom Bracket Tool Features Part of a comprehensive range of freewheel and bottom bracket removal tools 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 Made in the USA and covered by Park Tool's legendary limited lifetime warranty