The scope of delivery is subject to the first picture, the other pictures are the display effect Professional craftsmanship quality. Thick blades can be sharpened multiple times. Easy to store between jobs. Quickly help you, very suitable for making clean flat-bottomed holes in wood. 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, drill all arcs of the arc in all directions; ensure fast and correct waste removal, ensure true, accurate and clean flat-bottomed holes, and ensure your work is efficient. The PTFE coating of the valve body prevents the adhesion of chips, resin and residue. Provides visibility and stability during operation. The center gear of each drill bit ensures accurate drilling and prevents walking and swinging during operation. The sun gear design can perfectly form a round and accurate hole. Suitable for drill presses, hammer drills, bench drills, vertical drills, portable electric drills, drill presses and mobile installation drawers drilled with ball points; wood products, plastic products, wood and plywood perforation. A variety of overlapping, tilting and wood perforation, hinge holes, cylindrical holes, threaded holes for computer desks, 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 fixed drill bit. Maximum speed: 6000 rpm Suitable for impact drills, bench drills, portable electric drills for vertical drills, vertical electric drills and magnetic drills with moving belt. Good impact resistance and toughness. Accurate and clean flat bottom holes for fast waste removal. In the curved design, the nozzle can effectively remove debris and work efficiently. It is safer and more accurate to use this drill in a drill press. Under the guidance of the circular edge, drill all arcs of the arc in all directions; ensure fast and accurate waste removal, ensure real, accurate and clean flat bottom holes, and ensure your work is efficient. Packing list: Drill Bit Combination Tool (4pc Barrel Cork Drill Bit) If you have any questions, please feel free to contact us. Please allow slight deviation in the measurement data and make sure you do not mind before ordering. High quality store for you! Shop tips: 1. The size is manually measured, please allow the error (1-3 cm). 2. Due to the different monitor pixels, there may be some color difference, please refer to the actual product.