Made from Tungsten steel and being hot-treated, the blade is characterized by high accuracy, smooth cutting operation, good resistance to shock and good toughnessPrecision ground for heavy use and resharpened, they can enlarge existing holes with ease and can bore any arc of a circle2 spurs, 2 precision ground cutting edges, long-lasting cutting performance, , for drilling holes in any direction and making arched openingsExcellent workmanship: The effective depth is , and resharpened, they can enlarge existing holes with ease and can bore any arc of a circle. Individual Titanium Coated Forstner Bits for use on Wood, For drilling holes in any direction and making arched openings. Drill precise flat bottom holes with no chipping in any thickness of Wide Application: Used for wood, particle board, top drawer, plywood, etc.. Applicable to the drill, bench drill, vertical drilling machine etcColor: red+silverDesigned to drill flat bottom or through holes cleanly in end grain, thin stock, veneers, and regular stockFor drilling holes in any direction and making arched openingsThe drilling efficiency is higher with the three teeth cutter head. In design with curve, the head is good at removing the debris and working efficiently. Sharp and durable, strong to handleWorks with an electric drill (not included)10Pcs/set include 10 different boring diameters: 15mm/16mm/18mm/20mm/22mm/25mm/30mm/32mm/35mm/50mmPackage content: 1 x 15mm(0.59inch) Forstner Drill Bit1 x 16mm(0.63inch) Forstner Drill Bit1 x 18mm(0.71inch) Forstner Drill Bit1 x 20mm(0.79inch) Forstner Drill Bit1 x 22mm(0.87inch) Forstner Drill Bit1 x 25mm(1inch) Forstner Drill Bit1 x 30mm(1.18inch) Forstner Drill Bit1 x 32mm(1.26inch) Forstner Drill Bit1 x 35mm(1.38inch) Forstner Drill Bit1 x 50mm(2inch) Forstner Drill BitOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.