The ColumPRO 15PCS Countersink Drill Bit Set is a complete woodworking solution designed for precision, speed, and clean results. Each bit is made from industrial-grade high-speed steel with a nitride finish for enhanced strength and wear resistance. The tapered drill bits create accurate pilot holes, while the 82° countersink angle ensures smooth, flush screw seating. The included plug cutters help conceal screw heads for a flawless surface, and depth stop collars allow precise depth control for repeatable, professional results. With a 1/4" hex shank for quick changes, this set works with most power drills and impact drivers—making it a must-have for both professionals and DIY enthusiasts working on cabinetry, furniture, and woodworking projects of all kinds. ColumPRO — Precision Tools for Every Craft.