The BlueSpot 4 PCE Screw Extractor is manufactured from M2 Steel for increased hardness, durability and cutting ability. The extractor set is ideal for the removal of screws by using side one (anticlockwise) to create a smooth hole in the screw head and then using side two (anticlockwise) to remove the screw from the material. The varying extractor sizes can remove screw heads from 3-12mm and can be used on all screw head types.