Park Tool's Bottom Bracket Bearing Tool Set removes and installs (with a bearing press which is sold separately) BB86, BB90, BB92 and Press Fit bottom brackets from Shimano, Race Face, SRAM and others that use a nominal 24mm-diameter spindle. This tool has a bearing remover that fits inside the bottom bracket shell and into the bearing so the bearings can be tapped out of the frame with a hammer. The set also includes two bushings that you use in conjunction with a bearing press for precision bearing installation (bearing press sold separately).