Park Tool OBW-4 Offset Brake Wrench PSI made from heavy black cardboard

made from heavy black cardboard FSC certified

Race-ready performance

the Aerothan tube is the first choice

Take on any surface with the Shimano GRX Di2 Shifters and Calipers

Park Tool OBW-4 Offset Brake Wrench PSI made from heavy black cardboardThe Park Tool OBW 4 is a specialty bicycle wrench designed for the installation and adjustment of side pull and dual pivot bicycle rim brakes. Its unique offset design and thin profile (2. 1mm thick) allow it to access tight places where standard wrenches would be impractical. The OBW 4 features 10, 11, 12, and 13 mm wrench openings to fit wrench flats found on many side pull and dual pivot brake calipers. Mfr Claimed Weight TBC