Premium Material: Our screw extractor is made of high speed steel, with high hardness, high wear resistance and high heat resistance, it is a good helper for removing screws broken. Complete set: 10 drill tools, 5 different sized screw extractors (sizes EX-1, EX-2, EX-3, EX-4, EX-5) and 5 different sized cobalt drills (5 sizes / 64 , 7/64 , 5/32 , 1/4 , 19/64 . 6cm), match your requirements working. 【Professional Tools】 This drill bit set has unique spiral flutes, increase the strength and stiffness of the tool, drill a hole with a drill, then use the extractor to remove the broken screw, greatly relieve your stress. Compact Size: Our industrial tools have small size and lightweight design, easy to use and operate. With an elegant black metal box, they can be easily and neatly stored in the box, easy to carry. 【Many applications】 Suitable for manual drilling rigs, electric hand rigs, drilling and milling machines. For Allen screws, hex bolts, machine screws, wood screws, sheet metal