Premium Material: The damaged screw extractor set is made of high quality high speed steel (HSS), fine workmanship, high hardness, reusable, high efficiency, durable and high temperature resistant, helping you remove damaged screws and bolts. Multiple Sizes: The screw extractor set includes 10pcs drill bits (sizes #1 #10), 10pcs extractor (sizes #1 #10), 1pc extension drill holder and 1pc socket adapter, so that you can easily remove damaged screws of different sizes. Practical Design: Our damaged broken screw extractor features a unique practical design and offers excellent efficiency on damaged screws of different sizes. Many different sizes and types allow for quick and easy changing. Easy to Use: Our broken screw removal tools are easy to use. Just choose an extractor smaller than the damaged screw, then insert it into the tilting tool of the power drill. The screw removal kit comes with an essential toolbox, which is convenient for you to put in your pocket or take with you