6-Piece Screw Extractor Set: The screw extractor set (#0, #1, #2, #3, #4) is suitable for any drill bit and any screw or bolt size. This damaged screw extractor can extract damaged, stripped or broken screws of all common sizes. Usage Tips: Remove the damaged screw extractor of the appropriate size. Install it on the hand drill, drill into the screw with the drill bit (appropriate depth), change the other end to drill to a certain depth, and then turn the opposite direction to unscrew the damaged screw. Material: The left-hand extractor set is made of strong and durable 4341 steel, which provides reliable performance due to its high hardness and wear resistance. With these extractors, screws with broken heads can be easily screwed out with only a short drilling, thus avoiding time-consuming drilling. Wide Application: The damaged screw extractor can be widely used in household, telecommunication, automotive or mechanical repair work. And tools must be available to every handyman, auto or boat mechanic, construction worker, carpenter, joiner or anyone who regularly works with screws and bolts. Wide Application: The damaged screw extractor can be widely used in household, telecommunication, automotive or mechanical repair work. And tools must be available to every handyman, auto or boat mechanic, construction worker, carpenter, joiner or anyone who regularly works with screws and bolts.