The Klein 640-7/16 Coated Hollow-Shank Nut Driver has a Cushion-Grip handle allows for greater torque and comfort, and a full hollow shaft that facilitates work on stacked circuit boards or other long bolt applications. Other features include: Internal flanges provide solid, twist-resistant shaft anchor; Premium chrome-plated for smooth feel and corrosion resistance; Meets or exceeds applicable ASME/ANSI specifications; Handle end is color-coded for easy identification; Patented Tip-Ident quickly identifies nut driver and size; Entire shank is plastic-coated for circuit protection only- NOT INSULATED; Special plastic coating resists cutting, cracking, and chipping; Thin coating permits use in confined areas. Color Code: Brown. Hex Size: 7/16-Inch. Overall Length: 7-5/16-Inch. Shank Length: 3-Inch. Weight: 0.30-Pound. Safety warnings: Always wear approved eye protection. NOT insulated- will NOT protect against electrical shock; Coating is intended for protection of circuits only.