Save effort :The bolt remover removes broken or damaged screws, bolts and fasteners effortlessly, improving work efficiency. Advantage : The screw extractor is made of high-quality materials, the overall heat treatment is strong and durable, practical and efficient, and durable enough, black oxidation treatment, durable Package :Comes in a storage box with 12 pieces: 6 pieces for screw extractors (4.0 mm / 4.5 mm / 6.5 mm / 7.5 mm / 11.0 mm / 15 mm) and another 6 pieces for drills (3/32 ") ,1/8" , 3/16" ,1/4" , 5/16" , 3/8"). Very convenient and practical to set up all these tools and carry them everywhere. Application :Suitable for removing all available terms such as bolts, screws and studs ranging in diameter from 4 mm to 25 mm. Need :Whether you are a professional or an amateur, you can all keep such a set of tools at home in case of any necessary situation. Features: Remove broken or damaged screws, bolts and fasteners without any effort. Suitable for removing all available terms