This tool is the answer when working with theatrical pipe clamps, an industry standard ratcheting speed wrench, fits most bolt heads on clamps. This 3/8", 1/2" and 3/4" light speed wrench is handy for getting your work done quickly. Angled design for getting in tight spaces. Reversible ratcheting for fast, quick use. A tool that every gaffer, grip or rigger needs especially when working in a studio lighting grid hanging or moving lights and studio equipment. Works with all the standard c-clamps on film and theater type light fixtures. Steel construction with chrome finish. Made in the United States.