General description 11pcs Broken Screw Extractor Set is designed for efficiently removing damaged screws, bolts, and fasteners. This versatile tool can also drill holes in various materials such as wood, metal, plastic, bricks, and walls. The set is made from high-quality chrome vanadium steel, ensuring durability and resistance to rust. Technical specifications Material: Chrome vanadium steel Drill bit diameter: Engraved on the housing Recommended break-off screw diameter: Engraved on the housing Size compatibility: 3-10mm screws Usage Designed for removing damaged, rusted, or stripped screws, studs, bolts, fixings, fasteners, metal faucets, and water pipes. Utilizes a left-hand spiral groove for the extractor and a right-hand spiral groove for drilling, providing extra grip. Turning the thread disconnector counterclockwise tightens it in the inner hole, allowing for effective screw rotation when sufficient tightness is achieved. Other information Note: The screw thread direction is