The Westward RatchetingCombination Wrench, No. 34E312, features a ratcheting open end that lets the user quickly tighten or loosen fasteners that cannot be accessed from top or bottom, such as hydraulic fittings. They come made of chrome vanadium steel with a full polish finish and meet ASME B107.100 specifications. They're built tough, priced right and come backed by a Satisfaction Guarantee.