KLEIN TOOLS 600-1 Screwdriver Keystone 5/16 in 3-7/16 in L

Heavy-duty square shank for wrench-assisted turning. Bolster reinforces shank for hard use. Designed for the most demanding uses. Cushion-Grip handle for greater torque and comfort. Premium chrome-plated for smooth feel and corrosion resistance. Internal flanges inside handle provide solid, twist-resistant blade anchor. Precision-machined tip for exact fit. Special heat-treated shafts. Patented Tip-Ident® quickly identifies the screwdriver type and tip orientation.