Klein Tool’s keystone screwdriver with 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. 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 and premium chrome-plated for smooth feel and corrosion-resistant. Made in USA. 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.