46 mm PARK TOOL BBT-79.3 crankcase disassembler

This PARK TOOL BBT-79.3 key is used to install or remove the outer cups of the 46 mm bottom bracket shells. Precisely CNC-machined, this aluminum part fits into the 12 notches of the cups, and is compatible with 3/8" torque wrenches and ratchets.

What's more, its outside diameter is easy to grip, and its integrated thread allows use of the BBT-RS, Bottom Bracket Tool Retaining System (sold separately).