The Silverline Damaged Screw Remover Set is designed to easily extract damaged screws. Simply fit the screw remover into a drill, switch to reverse, and drill the screw out. The special head cuts into the screw, removing it without damaging the surrounding material. Made from chrome molybdenum steel, this set features a “ / 6.35mm hex shank and an overall length of 50mm. The set contains 5 pieces.