This 6 pc impact socket set features 12 sizes in 6 easy-to-carry sockets and consists of the most commonly used impact socket sizes for electrical and construction work. Each impact socket features two coaxial spring-loaded sockets in one. The high-torque, 6-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.