- Reliable quality: The screw extractor set is made of chrome vanadium steel with secondary tempering for high hardness, rust resistance and durability. This speed-out screw extractor can be used to drill holes in wood, metal, plastic, brick and wall. - Ideal design: The left-hand (extractor) and right-hand (drill) spiral grooves are designed for extra clamping force. This damaged screw extractor set is an ideal tool for removing damaged, rusted or stripped screws, studs and bolts. A faucet handle provides easy grip on the screw extractor. For large extractors, you can use an adjustable wrench as a secondary. This screw extractor drill bit set also has the function of tightening metal faucets and water pipes, fastening fasteners. - How to use: First drill a hole in the center of the broken screw with an appropriate drill bit, then use the extractor to remove the screw. The box of each tool is engraved with the drill bit diameter 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. - Efficient and labor-saving: The screw extractor set contains 10 screws and a tap die wrench. The screw sizes are complete; each thread is engraved with a clear scale, stored in a plastic box for easy carrying, storage, finding and use.