This set is equipped with one bottom bracket bearing remover & two bushings that will assist with the fitting of new bearings. Ideally suited to removing & replacing BB30, Press Fit 30 (PF30), 386EVO, BBright & PF121 systems, this pack is all you need to get the job done in no time at all. An up-to-date version of Park Tool's BBT-30.3, this set gives a longer length to work with wider fat bottom bracket shells, making the Bottom Bracket Bearing Tool Set BBT-30.4 a fantastic tool to grace to any garage or workshop. How To Use: To remove the bearing, the remover is fed through the shell until the flat head goes into the opposite side bearing. Once engaged, the tool's plastic guide will fit into the near-side shell opening to hold the tool steady while you tap the handle end firmly with a hammer, until the bearing pops out. To install new bearings, the bundled bushings are used with a head cup press (not included) to quickly & accurately press the bearings into the shell.