THREAD DESIGN: The damaged screw extractor is designed with deep and wide threads for longer service life,good resistance to corrosion and wear, no easy breaking, for long-lasting use. MOLDED BOX: The broken screw extractor set comes with a molded box to keep these extractors organized, clean, secure and easy to find. FUNCTION: The extractor can easily and quickly remove broken or rusty water pipes, screws, bolts and more, very practical,provide you with good work experience, improve work efficiency. MAKING MATERIAL: The broken screw extractor is forged by premium bearing steel, overall has heat treatment, so it is rustproof and sturdy. SCREW REMOVING TOOL: The extractor is ideal screw removing tool for household use and professional electrician,manufactured with premium materials and professional process, perfect replacement for the old and broken one.