Description: Tapered Drill Bit Set: You will get 5 countersinks, #4 (7/64 inches), #6 (9/64 inches), #8 (11/64 inches), #10 (3/16 inches) , #12 (7/32 inch), which can meet your different needs. With a hex wrench, you can adjust the chamfer to control the drilling depth. High Quality Material: The counterbore drill bit is made of high-speed steel, with high hardness, wear-resisting, not easy to break, not easy to rust, and provides excellent cutting ability. The chamfering device is made of high carbon steel, strong and durable. Conical Design: Sharp taper twist bit charmer 90 degrees, cutting faster, can quickly and cleanly drill smooth holes. And to ensure a close fit with the screw, it is easier to locate the hole and the drill bit. Even after repeated use, the countersink bits remain sharp and work effortlessly. Adjustable: The high-quality countersunk hole is fixed on the plane of the handle by the hexagon socket screw to prevent loosening to ensure a firm fit, and can be adjusted to control the depth of the guide hole. Wide Range of Applications: Countersink drill bits are suitable for bench drills, hand drills and conventional electric drills. It can be used to drill holes in granite, ceramic tiles, metal, plastic, wood, and is an indispensable helper for drilling work. Our wood countersink set can meet your many needs. The high-quality materials are durable and you don't need to buy other drilling tools. Easy to use, suitable for hand drills, electric drills, widely used in ceramic tiles, metal, and wood. Features: 1. 5 models can meet your multiple needs. 2. High quality and long service life. 3. Simple operation and easy to use. 4. Suitable for electric drills and hand drills, suitable for ceramic tiles, metal, wood and other items. Warm Reminder: Please keep away from children, and store it out of reach of children. Specifications: Material: High Speed Steel, High Carbon Steel Shank Type: 1/4 Hexagonal Handle (6.3mm) Specifications: 7/64, 9/64, 11/64, 3/16, 7/32 Weight: 115g/4oz Color: Black Package Include: 5 x Countersink Drill Bit