Features:* Sharp edge, high hardness, accurate positioning, high precision, smooth cutting, impact resistance.* Arc-shaped blade, cutting resistance is small, improve the speed of the drill hole, easy chip removal, the hole neat, smooth, no broken edge, does not cause shaking phenomenon.* 5 different sizes of carbide forstner tipped bits: 15mm(19/32"), 20mm(25/32"), 25mm(1"), 30mm(1-3/16"), 35mm(1-3/8") for heavy use. Meet your requirements and easily enlarge the existing holes, and you can drill any arc of the circle.* Suitable tools: easy to install, easy to use, suitable for electric drill greater than or equal to 10MM, bench drill, high power electric grinding, air drilling, magnetic drill, pistol drill.* Wide range of applications any wood and wood products, plastic, plywood and other materials needed for exquisite perforation, Suitable for industrial hinge installation, woodworking and preservation, model production, spherical door installation, drawers and other occasions imaginable. Specifications:Product Name: Drill Material: HSSTyp: Single Tooth Flat Drill Bit Color: Silver(As the picture)Size: 15mm(19/32"),20mm(25/32",25mm(1",30mm(1-3/16"),35mm(1-3/8")Suitable for: Wood & Wood Products, Plastic, Plywood & Other MaterialsQuantity: 5pcs/setPackage Content:5pcs/set Drill Notes:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.