1. Reliable qualityThe screw extractor set is made of chrome vanadium steel with secondary tempering, featuring high hardness, rustproof and sturdy. This speed out screw extractor can be used to drill holes in wood, metal, plastic, brick and wall. 2. Ideal DesignThe left hand (extractor) and right hand (drill) spiral groove is designed for extra clamping force. This damaged screw extractor set is an ideal tool for removing damaged, rusted or stripped screws, studs, bolts. It has a faucet handle for easy grip on the screw extractor. For large extractors, an adjustable wrench can be used as a secondary. This screw extractor drill bit set has the function of tightening metal faucet and water pipe, fastening fastener. 3. How to useFirst drill a hole in the center of the broken screw with a suitable drill bit, and then use the optional extractor to remove the screw. The box of each tool is engraved with the diameter of the drill bit and the recommended extraction diameter of the broken screw. The thread direction of the screw is positive, while the thread direction of the broken screw is negative. 4. Efficient and laborsaving assistantThe screw extractor set contains 10 screws and a tap die wrench. The screws' size are complete, each thread is marked with engraved clear scale, stored in a plastic box, easy to carry, store, find and use.