Features Versatile: The stripping screw extractor kit includes 20 pieces of stripping screw extractors in 10 different sizes to meet all your needs. Suitable for many types of damaged screws and bolts. Wide Range of Applications: Suitable for any size screw or bolt, the screw removal tool maintains high availability and durability. Suitable for most common drill bits and screws or bolts of different sizes, such as socket head cap screws, machine screws, studs, wood screws, hex screws, self-tapping screws. Easy to Remove: The wire stripping screw extractor kit includes two extended drill bit holders. It can be dismantled in one step without changing the extractor or adjusting the collet. Material: The screw extractor is made of high-quality high-speed steel 4341, which has high hardness and durability, and can easily take out damaged screws. Reusable, efficient, durable and high temperature resistant, includes extended drill holder and socket wrench adapters to help you remove damaged screws and bolts efficiently. Rest Assured to Use: The screw extractor has been inspected many times before leaving the factory, and the quality is guaranteed, so you can use it with confidence. Widely used for home,telecommunications, automotive or mechanical repair work. Various sizes are available to meet your individual requirements. Specification: Item Type: Screw extractor Material: High speed steel Drill Bit Model: DR/EX Operation Way: 1.#6-#10 size first need to be installed in the socket adapter, and then attach it to the expansion rack (other sizes can be directly connected to the expansion rack). 2. Use a DR drill to drill a hole in the broken screw. 3. Change to use the same size of extraction (Ex) bits. 4. Use the drill bit upside down and take out the damaged drill bit. Package List: 20 x Screw Extractor(Ex#1-#10, DR#1-#10)  1 x Magnetic Extension Position Holder1 x Socket Adapter Note: 1. When the surface of the broken screw is smooth, you must drill holes first. Otherwise the drill bit will slip. 2. It must be vertical and low speed when drilling. Use this drill bit upside down, the deeper the first hole drilled, the easier it is to take out. 3. It is best to use electric hand drills, not hammer drills. It must be low speed during use. Package List 20 x Screw Extractor(Ex#1-#10, DR#1-#10) 1 x Magnetic Extension Position Holder 1 x Socket Adapter