This straightforward tool works with most bottom brackets with 16 external notches & an approximate 44mm outside diameter. Strong & durable, this effective tool is perfect for your workshop for using on a variety of bottom brackets & features a 3/8" drive, making it compatible with most torque/ratchet wrenches for efficient loosening & tightening. Suitable for use with Shimano, Campagnolo, Fulcrum & a wide range of other threaded cups. Compatibility: Shimano BB80B, BB80D, BB4600, XT BB70B, BB52B + previous external bearing threaded cups; Campagnolo, Chris King, FSA Mega Exo, Hope, SRAM/ Truvativ GXP, Race Face X-type, Surly, Wheels, Fulcrum, Token + other external threaded types