A complete collection of most frequently used 1/4 in. drive sockets in SAE sizes Premium Chrome Vanadium steel tempered with our proprietary heat treatment process to withstand more torque MaxChrome plating, achieved through thorough polishing and careful application of chrome protective plating, ensures durability and corrosion resistance 6-point WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage 20-piece set includes (10) 1/4 in. drive 6-point deep sockets: 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2, 9/16 in., (10) 1/4 in.