This 5 pc impact socket set features 8 sizes in 4 easy-to-carry sockets, and consists of the most commonly used impact socket sizes used in electrical and construction work. Each impact socket features two coaxial spring-loaded sockets in one. The high-torque, 12 point design is easier to position on fasteners including square ones. Includes a 1/4 in hex by 1/2 in adapter and convenient carrying case. Includes Socket Size: 7/8 x 11/16 in, 3/4 x 9/16 in.