Widely Used: The 5 piece screw extractor set can remove 2-12mm screws, works with most commonly used drill bit and any size screw or bolt, nail, such as cap screw cross head, slotted screw, pozi screw, etc. Premium Quality: Made of durable hardened steel. for a longer life. Remove Stripped Screws: Simple and easy removal of damaged, stuck, stripped, broken, rusted screws and deck screws. Easy to use: Use one of the drill heads to drill a deep hole in the screw head counterclockwise until it comes free. More convenient than double-sided stain remover, no need to replace up and down. Used in combination with an electric drill which can vary in speed and rotates in the opposite direction.