The 3/8 in. Drive Shallow Impact Socket Set is a collection of most frequently used 3/8 in. drive shallow impact sockets in SAE sizes Premium Chrome Molybdenum steel tempered with our proprietary heat treatment process to withstand more torque from power tools Expertly coated with manganese phosphate, the preferred coating in military and aerospace, which offers superior protection and corrosion resistance compared to black oxide coating on other impact sockets 6-point WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage 12-piece set 3/8 in. drive shallow 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 in.