4-Way Pen Screwdriver offers the convenience of four precision drivers in one pocket tool for efficient results. It features a pen-type design with a pocket clip and four tip sizes in one space-saving tool. Two double-ended bits include sizes 5/32" , 1/8" , 0PT and 1PT. Magnetic bits attract and hold small screws. Use in toy assembly, battery compartments, eyeglasses, electronics and cell phones. Diameter is 1/2". Length is 5.4".