Respond to various needs The screw extractor provides not only many ways to unscrew the damaged screw, but also provides bolts of different sizes (2 to 12 mm). It can also treat screws and irregular and irregular bolts. High quality The HSS material has the best anti-rust and anticorrosion performance. The notch on the extraction drill creates more strength for hard to remove bolts. Easy to use with the adapter holder and the expansion rod, the damaged screw can be Easily removed without wasting time and energy, and the operation is simple and practical. Pay attention to safety when using. Fittings The elongated blade holder (6.35 mm) and the socket adapter (4 mm) of the screw withdrawal kit are suitable for Most electric drills. Internal magnetism provides support and adapter prevents the needle from falling. Large application works with almost all drills, bolts and screws (2-12 mm). Ideal for bare screws, metal screws, fiders, wooden screws, hex bolts, sheet metal screws. Also suitable for drilling holes on soft materials such as wood, plastic. Outstanding features: Covers a wide range of screw heads (Cruciform, Phillips, Flat , Torxs, square, hexagonal, Security Torx, etc.) Extraction Easy of recalcitrant screws, whether damaged, broken, headless, rusty, painted or other. The tips allow to extract screws from all sizes, as follows: - 1 for screw extraction 6.0 ~ 12 mm- 2 for screw extraction 5.0 ~ 10mm > - 3 for screw extraction 4.0 ~ 8.0mm- 4 for screw extraction 3.0 ~ 5.0mm - 5 for screw extraction 3.5 ~ 6.5mm- 6 for screw extraction 3.0 ~ 5.5mm - 7 for screw extraction 2.5 ~ 4.5mm- 8 for screw extraction 2.0 ~ 3.5mmConseils: 1. First, it is necessary to drill a hole when the surface of the rupture screw is smooth. Otherwise, the drill will slip. 2. Must be vertical and at low speed when drilling; Reverse the use of this drill, drill the first hole deeper to facilitate extraction. 3. It is better to use an electric hand drill, can not be used in percussion drill mode Must be at low speed during use Specification: Material: Fast steel Quantity: 22pcs Pack comprising: 22 x Screw cleaner