8pcs screw extractor set in different sizes, designed for easily removing various stuck screws. High hardness alloy steel material, stable, reliable and long service life. Use a suitable size drill bit to drill a hole on the screw head, then reverse the remover counterclockwise into the damaged screw until it is released. Can remove even the most stubborn, damaged, embedded, rusted and painted screws and bolts. Comes with a box for easy storage and carrying of the screw extractors.