The scope of delivery is subject to the first photo, other images are the display effect 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 image. 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 flat bottom holes real, accurate and clean and make sure 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 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 bottom holes.