8PCS/SET Screw Extractor Damaged Screws Bolts Broken Pipes Remover Extractor with Storage Case Features: -made of carbon steel and are tempered twice for extra hardnes and durability -works on wood and machine screws as well as flat, hex, or painted over screws -different sizes of screw extractor to meet different needs -reverse threads bit easily remove screws, bolts, studs, and threaded pipe fittings -remove most kinds of damaged strips, rusted, broken, or stuck screws from any wood or metal surface -please ensure to run the drill in reverse during the screw extracting process Specification: Product Type: Screw Extractor Material: Carbon Steel Quantity: 8Pcs / Set Box Size: 20cm x 13cm x 5cm Weight: 766g Package included: 1 Set x Screw Extractor