Park Tool 3/8" Drive Breaker Bar Description: The SWB-15 is a 15" forged-steel breaker bar designed for extra leverage for removing stubborn crank bolts, bottom brackets, freehubs, pedals, or other seized fasteners found on a bike. The 3/8" square drive head pivots 180deg and is compatible with many Park Tool products. Features: A 15" forged steel breaker bar with a 3/8" square drive head that pivots 180 degrees Features a long, knurled handle, which is extremely useful when extra leverage is needed to remove stubborn fasteners