Our screw extractor is made of high quality alloy steel, reusable, high efficiency, durable and high temperature resistantFull model specification, application to many kinds of damaged screws and bolts. Includes 10 pieces of drill bits (sizes from #1 - #10), 10 pieces of extractor (sizes from #1 - #10), 1 piece of extension bit holder and 1 socket adapter to help you remove bits. various sizes of damaged screwsThe screw removal kit comes with an essential toolkit, it's very convenient to put it in your bag or take it anywhere you want. You can easily remove any stripped screw in 10 seconds or less Widely used, suitable for allen bolts, machine screws, lag bolts, wood screws, hex bolts, sheet metal screws and other screws. High precision hole position, ideal damaged bolt and screw removal tools Quick & Easy to use: 1. Size of #6~#10 needs to be installed in the socket adapter first, then attach it to the extension bit holder.2. Other sizes #1~#6 can be attached to the extension bit holder directly.3. Use the drill bit (Dr) to drill a hole in broken screws.4. Changed to use fetch bit (Ex) with the same size.5. Reverse the drill and remove the broken screws. Package Contents: - 20 x Tool Damaged Screw Extractor (Ex #1 - #10, Dr #1 - #10)- 1 x Magnetic Bit Holder- 1 x Socket Adapter - 1 x Box Warm Notice: 1. Please allow little size errors due to manual measurement.2. Colors may exist slight difference due to different monitors.