Wood Drill Bit Set, 5 Pcs Countersink Screw Drill Bit Set, HSS Woodworking Chamfer Countersink Tapered Drill for Drilling Wood, Plastic, Pilot Holes (8MM) PREMIUM QUALITY: These tapered drill bits are made of high-quality alloy steel, offering superior cutting power. High hardness and wear resistance ensure convenient and fast hole drilling. Various Sizes: The drill set includes 5 different sizes: 2.8x8mm/3.0x8mm/3.2x8mm/3.5x8mm/4x8mm. Removable and Adjustable: Use the included wrench to remove the screw and adjust the length of the countersunk hole to set the drilling depth for screws of various lengths. These drill bits are highly useful in daily life and significantly improve your work efficiency. Multiple Uses: Ideal for wood, plastic, soft metal, fiberboard, aluminum alloy screw cutters, pilot holes, etc. Function: Provides faster cutting and chip removal, eliminating the need to change drill bits for quick and smooth milling.