The Snap-On 1/2 Impact Wrench CT3850 is a powerful and reliable tool powered by two included batteries. With a voltage of 18V, this impact wrench is designed for automotive use and provides the necessary force for tasks such as fastening and loosening nuts and bolts. The included battery adaptor and charger make it convenient to use this tool on the go, ensuring you have the power you need whenever you need it. With the trusted Snap-On brand behind it, this impact wrench is a quality and durable addition to any tool collection.