Feature:1. These screw extractors are made of high‑speed steel quenched and forged, and the hardness reaches HRC‑60‑63.2. Using coarse‑tooth left‑rotating thread design, strong pulling force, not easy to fall off.3. Used to quickly and easily pull out broken screws, pipes and bolts that cannot be removed with a standard screwdriver.4. The kit contains 6 extractors of different specifications, suitable for wood screws, iron screws, and steel screws of different strengths.5. Equipped with a plastic box, it is convenient to store and maintain these screw extractors.How to Use:1.Choose a rotor that is thin than the broken screw, and drill a deep enough hole in the middle of the broken screw with an electric drill.2.Choose an extractor the same size as the drill bit diameter, put it in the hole, and rotate it with the wrench.3.Use the extractor to screw in the broken screw counterclockwise until the broken screw is unscrewed.Specification:Item Type: Screw ExtractorMaterial: High speed steelPurpose: Take out broken screwsApplication Scope:1/8-1/4in (M3-M6)1/4-5/16in (M6-M8)5/16-7/16in (M8-M11)7/16-9/16in (M11-M14)9/16-3/4in (M14-M18)3/4-1in (M18-M25) Package List:6 x Screw Extractor1 x Storage Box