Description: Carbide Forstner Bitdrill clean holes in soft and hard wood. Twospurs and centering point to give the perfect solution to repeated, clean and accurate hole cutting time after time. The sharp center spur accurately locates the center of your hole. Use to drill precise flat bottom holes with no chipping in any thickness of soft wood. For drilling holes in any direction and making arched openings. For drilling partially overlapped flat bottom holes for easy mortising. Forstner Bit for industrial purpose is characterized with high hardness and long life, and resulting in nice finishing on woody pieces after cutting. Specification: Product Name: Forstner Bit Material: Carbide, Carbon Steel Shank Diameter: 8mm / 0.31inch Shank Length: 30mm / 1.2 inch Total Length: 90mm / 3.54 inch Main Color: Black, Silver Tone Cutting Diameter: Weight 15mm / 0.59inch 56g 16mm / 0.63inch 55g 17mm / 0.67inch 55g 18mm / 0.71inch 63g 19mm / 0.75inch 63g 20mm / 0.79inch 65g 21mm / 0.83inch 67g 22mm / 0.87inch 70g 23mm / 0.91inch 67g 25mm / 0.98inch 91g 26mm / 1.02inch 91g 28mm / 1.1inch 99g Package Content: 1pc x Forstner Bit Please Note: 1.When drilling holes, forstner drill bit is made only in the clockwise direction, not reversible, and the speeds from low to high is a gradual process. 2.Please grind the tool nose and tips to avoid ageing and damage when breaking; or it will cause a steep decrease in accuracy and quality for drilling holes after tips break.