Uniweld’s 70022 is designed for use on compressor access valves and Acetylene B/MC tank valves. 70074 and 70075 Double-end Reversible Ratchet Wrenches has an offset design for knuckle clearance in confined work spaces. -Chrome plated, heat-treated alloy steel, strong gear teeth and easy-flip reversing mechanism -Offset Wrenches are packed with Dual Hex Wrench Adaptors (DHVA for 70074 and DHW316 for 70075).