Package includes: 4 * Screw Extractors. The sizes of the screw extractors are different. 4 sizes for easy removal of screws of different sizes. Double-sided design: The bolt screw extractor kit has two functions in one. One end is used for drilling and the other for loosening. One has dual purposes, so you can easily remove damaged or rusted screws and bolts. Suitable for many screws: This kit is suitable for many situations, such as old worn screws, rusty screws, soft screws, stripped screws, round screws for door locks. Easy to remove damaged, stuck, loose, broken, rusted, free-spinning screws and pan head screws. Easy to use: It is easy to use and requires only two simple steps. Use a drill to drill a deep hole in the screw head and then turn the screwdriver counter-clockwise until the damaged screw loosens. Gift for the repairman: The kit is easy to use, and the screw head must first be drilled into the countersunk end of the drill. The screw can then be easily removed by turning the drill in the chuck. Suitable for craftsmen, workshops, hobby workshops, family workshops, everyday life. This is a very practical gift. Note: All data are measured manually, please allow an error of 1-3 cm. Due to differences in light and screen, there may be color differences, please refer to the actual item received.