This air impact wrench has a 1/2” square drive and is supplied with a carrying case. The case contains impact sockets, extension bars and a mini oiler. Power: 31.7kg-m. The air impact wrench has a long-lasting frame as it is made of highly resistant materials with special anti-rust and anti-corrosion finish. This is a durable impact wrench with a 1/2” square drive and it is strong enough to withstand heavy use.