Made from Tungsten steel and being hot-treated, the blade is characterized by high accuracy, cutting operation, good resistance to shock and good toughness Precision ground suitable for heavy use and resharpened, they can enlarge existing holes with ease and can bore any arc of a circle 2 spurs, 2 precision ground cutting edges, long-lasting cutting per suitable formance, , suitable for drilling holes in any direction and making arched openings Excellent 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 suitable forstner Bits suitable for use on Wood, suitable 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 suitable for wood, particle board, top drawer, plywood, etc.. Applicable to the drill, bench drill, vertical drilling machine etc Color: red+silver Designed to drill flat bottom or through holes cleanly in end grain, thin stock, veneers, and regular stock suitable for drilling holes in any direction and making arched openings The 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 handle Works with an electric drill (not included) 10Pcs/set include 10 different boring diameters: 15mm/16mm/18mm/20mm/22mm/25mm/30mm/32mm/35mm/50mm Package content: 1 x 15mm(0.59inch) suitable forstner Drill Bit 1 x 16mm(0.63inch) suitable forstner Drill Bit 1 x 18mm(0.71inch) suitable forstner Drill Bit 1 x 20mm(0.79inch) suitable forstner Drill Bit 1 x 22mm(0.87inch) suitable forstner Drill Bit 1 x 25mm(1inch) suitable forstner Drill Bit 1 x 30mm(1.18inch) suitable forstner Drill Bit 1 x 32mm(1.26inch) suitable forstner Drill Bit 1 x 35mm(1.38inch) suitable forstner Drill Bit 1 x 50mm(2inch) suitable forstner Drill Bit Only 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.