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Features: ● 100% brand new and high quality ● It is far safer and more accurate to use this drill bit in a drill press. ● Processed by the painting, the cutter is water-proof, anti-corrosive, and durable. ● In design with curve, the head is good at removing the debris and working efficiently. ● The tip is specially designed to cut through hole cleanly, great for boring concealed hinges and door clocks. ● Made from carbon HSS steel and being hot-treated, the blade is characterized by high accuracy, smooth cutting. Operation, good resistance to shock and good toughness. ● It is suitable for cutting holes onto woods.Precision ground for heavy use and easily resharpened, they can enlarge existing holes with ease and can bore any arc of a circle. Specification: Suitable for: Wood, Plastic Products, Plywood Material type: Carbon High Speed Steel Size: 16mm, 20mm, 22mm, 25mm,30mm, 35mm (5/8-Inch, 3/4-Inch, 7/8-Inch, 1-Inch, 1-1/8-Inch, 1-3/8-Inch) Package Included: 6* Forstner Drill Bit Important Note: When you using this drill bit, the materials (eg. wood, plastic products, plywood ect.) temperature will get very high , please add some water or coolant to avoid the material get smoke.