Impact pieces are constructed of heavy-duty drop-forged premium chrome vanadium steel to withstand extreme levels of torque changes against fasteners 6-point hex socket design prevents round-off deterioration under high torque and hammering stress with use of impact and electric wrenches Highly visible laser-etched markings on corrosion-resistant black phosphate finish makes it easy to identify drive socket sizes, specs, and measurements Sturdy and strong blow molded case features socket size labels for organized storage and is secured by two lever locks The complete set comes with the following pieces: 29 x 1/2" drive sockets - SAE: 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8, 1-1/4", Metric: 10, 11, 12, 13, 14, 15, 17, 18, 19, 21, 22, 24, 27, 30, 32mm; 2 x 1/2" extension bars: 3, 5-inch, 1 x 3/8" (F) to 1/2" (M) adapter Great for Automotive Repair Unmatched Quality Each piece is crafted from heavy duty chrome vanadium steel to withstand extreme levels of torque. Drop forged steel ensures the extra durability and each piece lasts throughout multiple uses. High Versatility This complete set equips you with a wide range of sockets in both standard and SAE sizes as well as accessories to make fastener applications quick and efficient. Easy Storage Comes with a blow molded cases so you never loose track of your odd ends. Great for transportation between job locations as well. No More Rounding Off Corners Our innovative 6 point flank drive holds onto fasteners and prevents any rounding off corners. This means your fasteners are protected and so are your sockets. Long Lasting Durability Black phosphate is a coating used on sockets to protect them from all the dirt, oil, and grease that could potentially break down the socket quality. Ours uses a premium black phosphate finish rather than a black oxide coating traditionally found on other sockets. Easy to Identify Stop wasting time and guessing which socket is which. Our laser