General description 8pcs screw extractor set in different sizes, designed for easily removing various stuck screws. 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. Technical specifications Material: High hardness alloy steel Durability: Stable, reliable, and long service life Installation Use a suitable size drill bit to drill a hole on the screw head. Reverse the remover counterclockwise into the damaged screw until it is released.