This 7-Piece Impact Socket Set features 6 standard sizes in three color-coded sockets. Each impact flip socket features two coaxial spring-loaded sockets in one. Set includes Nested adapters for dual drive (1/4-Inch hex flip socket shaft nests into 3/8-Inch square drive adapter). Also comes with a compact, modular storage system with a clear lid that is compatible with MODbox™ and stackable with other cases of its similar design.