Fits Shimano, Sun Race, Sachs, and other 12 spline, 22.7mm diameter 510 speed freewheels and all Campagnolo cassette lockrings and Record, Chorus, Centaur, and Athena bottom bracketsDesigned to work with Pedro`s snap-channel Pro Socket Handle, a 24mm socket or wrench, or in a bench viseProfessional quality and precision sized for the perfect fitFreewheel RemoverBlack12-spline x 23mm6451230UPC/EAN/GTIN: 790983297664