Klein Tool's 3/8-Inch (9.5 mm) Keystone Screwdriver with 8-Inch (203.2 mm) square shank is designed for the most demanding uses. It has a cushion-grip handle for greater torque and comfort. Meets or exceeds applicable ASME / ANSI specifications and has Tip-Ident that that quickly identifies the screwdriver type and tip orientation.PRODUCT FEATURES:- 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 - Special heat-treated shafts - Precision-machined tip for exact fit - Meets or exceeds applicable ASME / ANSI specifications - Tip-Ident quickly identifies the screwdriver type and tip orientation