The Counter Sink Drill Bit / Gurjing Bit (4-5-6-8mm) is designed for precision chamfering, deburring, and countersinking holes in wood, metal, plastic, and other materials. Made from high-speed steel (HSS) or carbon steel, these bits provide smooth, clean, and burr-free finishes, ensuring professional-quality results. Ideal for carpentry, woodworking, and metalworking applications, they help create tapered recesses for screw heads and smooth hole edges. Their sharp cutting edges ensure minimal effort and maximum efficiency. Compatible with hand drills and drill presses, these counter sink bits are essential for professional and DIY projects.