• Use on the damaged screws & nuts.
• Special spiral design for easier to remove the damaged screws.
• Size: 3/8" Dr. 8, 9, 10, 11, 12, 13mm (Length:32mm)
            1/2" Dr. 14, 15, 16, 17, 18, 19, 21mm (Length:34mm)
            2pcs pin punches 72, ,80mm
• Camplete size for all you need.