Welcome to our store! Professional craft quality. Thick blades can be sharpened several times. Store easily between jobs. Help you quickly, very suitable for making clean flat bottom wood holes. Various package combinations, the specific delivery standard is: the first main picture. Made of cemented carbide, with long-lasting durability. Under the guidance of the circular edge, pierce all the arcs of the arc in all directions; ensure fast and correct waste disposal, make sure you have real, accurate and clean flat bottom holes and make sure your work is efficient. PTFE coating of the valve body prevents adhesion of chips, resin and residue. Provides visibility and stability during operation. The center gear of each bit ensures precise drilling and prevents walking and swinging during operation. The sun gear design can perfectly form a round and precise hole. Suitable for drill presses, impact drills, bench drills, vertical drills, portable electric drills, drill presses and mobile installation drawers drilled with spherical tips, drawers; wooden products, plastic products, wood perforation and plywood. A variety of overlapping, tilting and wood perforation, hinge holes, cylindrical holes, threaded holes for desks computer, easy drilling and domestication for cabinet fixing. Ideal for making flat bottom holes. Safety: The drill bit must be used on the drill bit. The rotation speed of the machine must be between 1200 and 6000 rpm. Do not use it on the router (the speed is too high). Compatible machine type: Each fixed drill bit. Maximum number of rounds: 6000 rpm Suitable for impact drills, bench drills, portable electric drills for vertical drills, vertical electric drills and moving belt magnetic drills. Good impact resistance and toughness. Precise and clean flat bottom holes for quick waste disposal. In curved design, the nozzle can effectively remove debris and work efficiently. It is safer and more precise to use this drill in a drill press. Under the guidance of the circular edge, pierce all the arcs of the arc in all directions; ensure fast and accurate waste removal, ensure real, accurate and clean flat bottom holes and make sure your work is efficient. Packing list: Drill Bit Combination Tool (4pcs Claw Cork Drill Bit + 6pcs Titanium Plated Countersink Drill Bit If you have any questions, please feel free to contact us.