Professional handcrafted quality. Thick blades can be sharpened multiple times. Easily store between jobs. Help you quickly, very suitable for making clean flat-bottomed wooden holes. Various combinations of packages, the specific delivery standard is: the first main picture. Made of cemented carbide, with long lasting durability. Under the guidance of the circular edge, drill all the arcs of the arch in all directions; ensure quick and correct waste disposal, make sure you have real, precise and clean flat bottom holes and make sure your job is efficient. The PTFE coating of the valve body prevents the adhesion of chips, resin and residue. Provides visibility and stability during operation. The central gear of each drill bit ensures precise drilling and prevents walking and swaying during operation. The design of the sun gear can perfectly form a round and precise hole. Suitable for drill presses, hammer drills, bench drills, vertical drills, portable electric drills, drill presses and mobile installation drawers drilled with ball tips, drawers; wood products, plastic products, perforation in wood and plywood. A variety of wood overlap, tilt and perforation, hinge holes, cylindrical holes, threaded holes for computer desks, easy drilling and domestication for cabinet fixing. Ideal for making flat-bottomed holes. ul Security: The drill must be used on the drill. 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 fixed. Maximum number of laps: 6000 RPM Suitable for hammer drills, bench drills, portable electric drills for vertical drills, vertical electric drills and magnetic walking belt drills. Good impact resistance and toughness. Precise and clean flat bottom holes for quick waste disposal. In the curved design, the nozzle can effectively remove debris and operate efficiently. It is safer and more precise to use this drill in a drill press. Under the guidance of the circular edge, drill all the arcs of the arch in all directions; ensure fast and accurate waste disposal, ensure real, precise and clean flat bottom holes and make sure your work is efficient. Packing List: Combination Drill Bit Tool (6pc Titanium Plated Countersunk Drill Bit If you have any questions, please feel free to contact us.