Professional ratchet made from Chrome Vanadium (hardened to Hrc40-45) with Chrome Molybdenum drive. 36 teeth mechanism. Innovative side switch for forward and reverse. Fully polished with black comfort grip handle. Test loaded to 646Nm (min).Professional.Chrome Molybdenum drive.Side switch for forward or reverse.36 teeth mechanism with quick release mechanismTest loaded to 646Nm.