Having reliable and dependable tools can make any mechanic's or maintenance engineer's life easier, so be sure to find a home in your tool box for the STEELMAN 78279 15-Piece 1/2-Inch Drive Deep 6-Point Impact Metric Socket Set. Constructed of durable and heavy-duty chrome vanadium steel, these sockets have the strength required for high torque jobs and will fit onto any 1/2-inch drive electric or pneumatic impact wrench, ratchet, torque wrench, extension bar, or adapter. These sockets all feature a rust and corrosion resistant black oxide protective finish and their deep well design allows them to access fasteners in slight recesses without an extension bar as well as nuts on extended bolts. The sockets' 6-point design grips the sides of fasteners and not the corners, reducing wear and the chance of slippage or rounding the fastener. Easy to read size markings are laser etched onto the steel making it simple to identify the socket you need without the worry that the markings will wear away or rub off with use. Set includes the following metric sizes: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, and 24mm. Rated to meet or exceed ANSI / ASME performance requirements for hand tools, these can handle tough use in any professional or home shop / garage.