Wide Compatibility: Extractor bolt set (#0/#1/#2/#3/#4) works with any drill and any or any size. Complete easy to remove bolt extractor kit to suit your individual needs.High Quality - The stripped screw extractor is made from 4341 high speed steel. High hardness, durable and easy to remove damaged screws. Easy to use: one drill has two different drill bits, one drill head is a hole in the broken screw head to remove the other, and the other drill head is used to remove the screw or bolt. 2-in-1 solution: the two-step solution eliminates the need for you to use more than one tool to remove damaged or stubborn screws. All you have to do is drill the screw with the drill before bending it to the other side and attaching it to your drill of choice. DESIGNED WITH DOUBLE END: HSS tractors are also designed with two ends to aid in the extraction process.One hole is drilled in the center of the ratchet lock with the drill end, the other is for removing screws or bolts. Wide application - Damaged screw extractor and damaged removal can often be used for work in homes, telecommunications, cars or machinery. and must have tool for any tradesman, auto or boat mechanic, construction contractor, carpenter, woodworker, or anyone who constantly works with screws and bolts. Note: The data is all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail .