KLEIN KLE-661-KL - #1 Square Screwdriver - 4"The Klein Tools #1 Square Recess Tip Screwdriver has a 4 Inch 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. Features Works on most combination head receptacle, switch and panel screws Tip Ident color coded handle end quickly identifies the screwdriver type and tip