bolt extractor kit can helps faster studs, bolts, socket screws, and fittings bearing steel materials, practical and flute screw extractor dimensions are engraved on the-extractor for easy identification Our flute is designed to embed themselves deeper into the metal as you turn the tool, so as the fastener resistance increases, the-extractor ' s grip increases Bolt remover that remove screws, whether working on wood or metal, are for ideal for construction, automotive, home projects or for industrial use, Manufacturer: SHANGYAKEJI