This 7-Piece Metric Impact Socket Set features sizes from 8 mm to 15 mm, crafted from cold-forged, heat-treated Cr-Mo steel for maximum durability under high torque. The included 3-Inch impact adapter allows for use with a 1/4-Inch impact driver. Secure your sockets with a carabiner on backpacks or tool belts for quick access. Industry-standard color-coded rings and bold stamped markings ensure fast size identification, making every job faster and more efficient.