... removing broken, damaged or embedded screw. Damaged screw remover Size: 3-6, 6-8, 8-11, 11-14, 14-18, 18-25, 25 ... -35, 35-50mm.1/8"-1/4", 1/4"-5/16"-7/16", 7/16 ... /16"-3/4", 3/4"-1", 1"-1-3/8", 1-3/8"-2". High Speed Steel or carbon steel.Medium duty ...