Wide Compatibility- The Bolt Puller Set(#0/#1/#2/#3/#4) works with any drill and any size screw or screw. Complete full size easy-out bolt extraction kit and can meet your individual needs. Hardness 63hrc- This damaged bolt remover tool kit is made of HSS 4341 (the hardness is 63hrc) alloy steel, durable for extracting stripped, broken, stuck or damaged screws. High Quality - Stripped Screw Extractor is made of high speed steel 4341. High hardness, durable and easy to remove damaged screws. Ease of use - one drill has two different drill bits, one drill head is to make a hole in the broken screw head so that the other can be taken out, the other drill head is used to remove the screw or bolt. Provides a 2-in-1 Solution - The two-step solution saves you the hassle of using more than one tool to pull out the damaged or stubborn screws. All you have to do is drill out the screw with the drill bit before flipping it over and attaching it back to your drill bit of choice. Designed with Two Bits - The high-speed steel extractors are also constructed with two bits to facilitate the extraction process. One is used to drill a hole in the center of the snap with the drill end, the other is used to pull out the screws or bolts. Wide Application- The damaged screw puller and remover can be widely used in household repair work , telecommunications, automobiles or machines. and must have a tool for every handyman, auto or boat mechanic, contractor, carpenter, woodworker or anyone who constantly works with screws and bolts. Comes in a plastic box for easy portability. Package Contents: 1 x 5 Screw Extractor Set(Gold) 1 x Storage Box