The Park Tool PW-5 is perfectly designed to securely engage the narrow 15 mm wrench flats found on bike pedals while providing the leverage needed to fully tighten pedals. With a small form factor compared to a shop wrench the PW-5 Pedal Wrench is perfect for the home workshop or event toolbox. Made from heat-treated spring steel and vinyl dipped for comfort the PW-5 is built to last.