Klein Tool's 5/16-Inch (8 mm) Keystone Screwdriver with 6-Inch 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 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 resistance
• 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