25mm Positionable Drill Bit It' s more accurate and safer to use these drill bit sets in a drill press.The tip is specially designed to cut through hole cleanly, great for boring concealed hinges and door locks.Great PerformanceThe head is good at removing the debris and working efficiently with curved design. Sharp edge, accurate positioning, high hardness, high precision, smooth cutting. Forstner Drill Bits can drill clean flat bottom holes with no chipping.High QualityHigh quality alloy blade, hardened, tempered and carbon HSS steel construction make blade more sharp and durable. More smooth, less noise. Processed by the painting, the cutter is water-proof, anti-corrosive.Woodworking DIY ToolsSuitable 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.Wide ApplicationsCan be used for wood products perforation, mounted spherical door shoot tip, drawer, plastic products, wood, plywood, etc. Suitable for pistol drill, bench drill, vertical drilling machine hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine, etc.