Klein Tools' KT-630 Cushion-Grip nut drivers are made of carefully heat-treated and tempered steel, with a cushion-grip handle that resists slippage, allowing users to apply greater torque. With handle end color-coding for easy identification, hex sizes include 1/4", 3/8", 1/2", 5/16" and 7/16", with a shank length of 3" (76 mm) for each. The patented Tip-Ident quickly identifies nut driver hex orientation and size so users can easily engage the nut driver with the fastener.