The Topeak Cartridge Bottom Bracket Toolsimplifies your job of Shimano and ISIS Drive bottom bracket cups significantly, made from forged steel the Tool is incredibly sturdy. It also features both 24mm wrench flats an 1/2" socket bore for full tool interface flexibility, ensuring you get the job done right! Topeak Cartridge Bottom Bracket Tool Features Forged CrMo Steel Tool 5.3x3.2cm 102g "
