Industrial grade impact socket set adopt higher quality chrome vanadium steel. After heat treatment and forging, it has high hardness and good toughness. Rugged construction for impact wrenches and other high torque tools. Deep Socket SetIncludes: 8mm,10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 19mm, 21mm, 22mm, 24mm, 1/2 inch drive ratchet wrench. Laser-etched markings on each socket in this socket tool kit for easy size identification make them perfect for you to use at home or on the job site.