Hammer this tool into damaged screw and reverse to remove the screw.
Use with either a wrench or socket (12mm, 16mm )
Special short length for using in a restricted space
Hex 12mm: 3mm, 1/8", 4mm, 3/16", 5mm, 5.5mm, 6mm, 1/4", 8mm, 3/8", 10mm.
Hex 16mm: 11mm, 12mm, 1/2", 14mm.