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. .