Proto® Slotted Square Shank Screwdriver: Broad line of professional screwdrivers offers a variety of shapes, sizes, and tips configurations to handle almost any screw turning operation. Proto insulated screwdrivers are tested to 10,000 volts.
Length: 10 5/16-inch
Tip Size: 5/16-inch Width
Shank Type: Square
Shank Size: 5/16-inch Diameter x 6-inch Length
Square shank to permit use of a wrench for added leverage
Cross ground for consistent fit
Tip is precise width and thickness to fit screw slot