Premium Material: Damaged screw extractor kit is made of high quality high speed steel (HSS), fine workmanship, high hardness, reusable, high efficiency, durable high temperature resistance, helping you to remove the screw the bolt damaged. Multiple Sizes: The screw extractor set includes 10 pieces of drill bits (Sizes 1 10), 10 pieces of extractor (Sizes 1 10), 1 piece of extension bit holder 1 piece of the socket adapter, to help you easily remove different sizes of damaged screws. Convenient Design: Our Damaged Screw Extractors have a unique practical design , provides superior efficiency for damaged screws of different sizes. Many different sizes types allow for quick easy changing. Easy to Use: Our broken screw removal tools are easy to use, just choose a smaller extractor than the damaged screw, then to insert it into the extractor of the drill press tilting tool. the screw removal kit comes with an essential toolkit, convenient to put it in your bag or take it anywhere you want. Wide Usage: Our screw extractor set has many multiple uses, perfect for removing stripped, broken, stuck or damaged screws for easily extracting encrusted, rusted painted screws bolts. Product Striated screw extractor is made of high speed steel (HSS), high hardness, durable easily removes damaged screws. The screw extractor is suitable for most screws, such as Allen bolts, machine screws, lag bolts, wood screws, hex bolts, sheet metal screws other screws . Screw extractors can be easily removed from rusted broken screws bolts. Separate drill bits extractors simplify the working process. The bolt removal kit is perfect for removing stripped, broken, stuck or damaged screws How To Use: 1. The size of 1 - 10 must be installed in the adapter socket first, then attach it to the extension bit holder (other sizes can be attached directly to the extension bit holder). 2. Use drill bit (Dr) to drill a hole in broken screws. 3. Change to use extraction bit (Ex) with same size. 4. Reverse, use drill remove broken bit. Specification: Material: HSS Color: Silver Quantity: 22 Pieces Package Includes: 1 x Socket Adapter 1 x Magnetic Extension Bit Holder 20 x Damaged Screw Extractors (Ex 1 - 10, Dr 1 - 10) Notes: 1. You need to drill a hole first when breaking screw surface is smooth. Otherwise, the bit will slip 2. Must be vertical low speed when drilling, use this bit in reverse, drill first hole deeper will be easier to pull out 3. It is best to use an electric h drill, can not be used in hammer drill mode! Must be at low speed during use!