The STEELMAN 99764 1/2-Inch Drive 6-point Thin Wall Deep Well Impact Socket Set is a 10-piece set containing the following popular standard (SAE) and metric sizes: 14mm, 17mm, 19mm, 21mm, 22mm, 13/16-inch, 7/8-inch, 15/16-inch, 1-inch, and 1-1/16-inch. Made from drop forged and heat treated chrome vanadium steel these sockets feature a ball detent recess on the 1/2-inch drive end to help them hold securely onto ratchets, adapters, and extensions. The 6-point design grips the sides of fasteners and not the corners, reducing wear and the chance of rounding the fastener and the thin walled design allows them to reach fasteners in recessed areas too narrow for regular sockets. The sockets each feature a rust and corrosion resistant black oxide protective coating with laser etched size callouts and markings. Rated to withstand up to 150% of ASME torque requirements for impact tools, these can handle tough use in any professional shop / garage or home workshop. When not in use the sockets can be stored in the included red metal storage box.