PARK TOOL BBT-32 BOTTOM BRACKET TOOL It is time you remove and replace your old worn out bottom bracket, so here's the tool for the job. The Park Tool BBT-32 Bottom Bracket Tool is economical and compact and is perfect for the home mechanic. The BBT-32 installs and removes Shimano(R) and ISIS Drive 20-tooth splined bottom bracket cups and features 32mm wrench flats. Features For removing Shimano and ISIS Drive bottom brackets. Related Articles: BBT-32 Instructions, Bottom Bracket Service: Adjustable Type Manufacturer's Part No: BBt-32 UPC: 763477000590 | Park Tool | Bbt-32 Bottom Bracket Tool | Black | Shimano & Isis 20 Tooth