Alloy tool steel socket is fully machined to precise tolerances for an exacting professional-level fitFeatures a unique dual function design with 5mm pin and removable magnetic 12mm pinExtra-long splines for superior engagement, quick-spin knurling, a 3/8` square drive for use with torque wrenches, and a 24mm external driveFits all Shimano, Sram, SunRace, SunTour, Chris King, and other HG standard cassette lockrings, disc brake lockrings, and other similar fittings with 12 splines and 23.5mm outside diameterFreewheel RemoverBlackShimano, Sram, Sunrace, Chris King12 spline - 23.5mm6460001UPC/EAN/GTIN: 790983298203