Countersink Drill Bit Set for Wood and Metal

This countersink drill bit set is designed for precise drilling and clean chamfering in wood, plastic, aluminum, and light steel. Each bit combines a high-speed steel drill with a 90-degree single-flute countersink, allowing drilling and countersinking in one smooth operation. The titanium-coated HSS tips provide improved cutting performance and durability, while the steel chamfer body ensures stable, accurate results. Suitable for woodworking, carpentry, furniture assembly, and general DIY tasks, the set includes multiple sizes for common screw diameters and comes with a hex key for easy adjustment and secure fitting.