The Klein Tools #1 square-recess tip screwdriver has a 4 in round-shank for work on combination head receptacles, switch and panel screws. The cushion-grip handle allows for greater torque and comfort. Patented Tip-Ident® quickly identifies the type of screwdriver and screwdriver tip orientation. Works on most combination head receptacle, switch and panel screws Tip-Ident® color-coded handle end quickly identifies the screwdriver type and tip orientation Special heat-treated, chrome plated shaft for corrosion-resistance 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