Product Description Features 【Application】Used to tighten hex nuts on repair clamps, mechanical joint fittings, and saddles. Works with a 1/2" square drive impact wrench or hand tighten. 【Package】Comes with a heavy duty case, including six different sizes of these extended sockets: 3/4", 7/8", 15/16", 1-1/16", 1-1/8" and 1-1/4" 【Material】Made of premium quality steel with black oxide finish which improves durability and prevents corrosion. This socket set can withstand heavy-duty impact use. .