The 3/8 in. Drive Shallow and Deep Impact Socket Set is a collection of most frequently used 3/8 in. drive shallow and deep 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 Wave Drive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage 24-piece set includes (12) 3/8 in. drive deep 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. and (12) 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.