Park Tool TWB-36 36mm Crow Foot Tool Description: The Park Tool TWB-36 is a crow-foot style wrench that can be used with any 3/8" drive wrench to achieve proper torque on driver tools with 36mm flats. Constructed from 4130 steel and finished with a durable coating for years of hard shop use. Features: Laser cut, heat treated and plated for long life Use with any 3/8" drive torque wrench to verify torque 36mm wrench flats Compatibility: Park Tool LTR-2 Park Tool LTR-3 Park Tool LTR-4 Park Tool BBT-18