Premium CR-V SteelMade from drop forged and heat treated chrome vanadium steel (50BV30) with black phosphate finish. Set Includes12 Pieces 3/8 in. drive shallow 6-point. impact sockets: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 inch. High-torqueRadius corner, 6-point design turns the flat sides of the fastener and provide maximum torque, while not peeling and damaging the corners. Laser Marking High-contrast size marking is permanently laser etched and easy to read, even in low light. Service GuaranteeAll MIXPOWER Tools meet or exceed ANSI performance standards. It comes with 1 year quality guarantee.