1. Square socket adapter 2' long, 7/16' hex to 1/2' square socket adapter for Milwaukee, Bosch, Dewalt, Hilti, and Makita brand cordless impact wrenches also known as a 'utility impact wrench' with quick change 7/16 hex female chucks. This will also fit numerous brands of air impact wrench with the same type of chuck2. The 7/16' shank will also chuck up into any 1/2' capacity drill chuck,Product Dimensions:2 x 0.5 x 0.79 inches,This length is the shortest that can be obtained, won't add unnecessary length3. This adapter has a typical ball shaped fastener instead of the pin shaped fastener found on most adapters. This makes it more convenient to use when working4. Made of highquality chrome vanadium steel, it has good wear resistance and long life under specific working conditions