✅【Superior material】: Positioning BitsThe positioning bits are forged from high-quality vanadium steel, high hardness, wear resistance, rust and corrosion resistance, and durable. ✅【Concentric shaft】:With high-precision concentric shaft, straight concentricity, it is not easy to shake when used, the screw is accurately fixed in place, the process of screwing is accelerated, and it is not easy to slip and wear, making your work more efficient and easier. ✅【Magnetic head】:The head is magnetic and can absorb screws to prevent slipping during operation and improve work efficiency. ✅【package Accessories】: 10PCS 50mm Drywall Screw Bits,2PCS Magnetic Extension Bit Holder,Bring you efficient and convenient daily work. ✅【Wide applications】:Widely compatible with electric screwdrivers, manual screwdrivers, electric drills, hand drills, etc., easy to install and remove screws. It is suitable for maintenance and installation of equipment in the household industry.