XIANQI High Quality --- The screw extractor set is made of high quality chrome vanadium steel,duable and easy to use,and using this tool will quickly and easily remove broken screws, water pipes, bolts, and studs. Wide Application --- The screw extractor set is a universal type and can be used with most drill bits and most sizes of screws or bolts. Our screw extractor can remove common sizes of peeled or damaged screws. Easy to Use --- The screw extractor is easy to operate simple steps can remove all jammed screws/bolts in a few seconds. Choose a drill bit smaller than the damaged screw to easily remove the screw. With Storage Box--- We have equipped these screw extractors with a small storage box, which can protect these screw extractors very well, so that you no longer have to worry about where your gadgets are hiding, which is very convenient. Description: Damaged Screws Extractor Removal Tool Material: high carbon steel Color: Silver and Black Designed: Spiral with pointed tip and square bottom end. These extractor tools are used to reverse the damaged screw counterclockwise until stripped screw extractor set is released. Damaged Screw Extractor is suitable for the most common drill bits and various size of screws or bolts, such as machine screws, lag bolts, wood screws, hex bolts, sheet metal screws,water pipe. This 8-piece damaged screw extractor is ideal for unscrewing damaged nuts and bolts of different shapes sizes without wasting time and energy. Stripped screw extractor removes even the most stubborn stripped, damaged, embedded, rusted and painted-over screws and bolts. Firstly, using drill clockwise select a drill bit (burnished side) smaller than the damaged screw and drill down into head of screw/bolt to make a clear hole. Then flip the tool to extraction part (spiral side) and switch drill to counter clockwise by applying constant slow pressure onto screw head. Follow these simple steps to get the job done. Color: red, black, silver Size: Please see the picture for details Package List: 8 * Screw Extractors 1 * Storage Box