We use premium Chrome Vanadium steel tempered with our proprietary heat treatment process to make these sockets and drivers. Each socket underwent careful polishing and protective plating process to achieve our own SmartKrome finish. 1/4 in Drive 1/4 in 12-Point SAE Deep Socket The precise 12-point WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage.