Description:The thickened hard coating can directly process the quenched steel above 65 degrees, effectively reducing the number of tool changes.With in-depth anti-rust technology, the product is anti-corrosion, which can effectively enhance the service life.Using high-performance micro-grain tungsten steel base material, the product has higher wear resistance and red hardness. The product features the standard design, which has strong compatibility, close occlusion, high endurance, and is not easy to break.There are 6 sizes for you to choose from 1.6mm, 1.7mm, 1.8mm, 2.0mm, 2.1mm, and 2.2mm. The high-strength and large-capacity spiral groove is anti-burning, and can efficiently remove wood chips and rapidly dissipate heat.It can be widely used for copper, iron, aluminum alloy, tool steel, hardened steel, cast iron, and high carbon steel drilling.Item Name: Drill BitMaterial: TungstenSize Details: 1.6mm: 0.16cmx0.16cmx4.5cm/0.06"x0.06"x1.77"(Approx.)1.7mm: 0.17cmx0.17cmx4.5cm/0.07"x0.07"x1.77"(Approx.)1.8mm: 0.18cmx0.18cmx4.5cm/0.07"x0.07"x1.77"(Approx.)2.0mm: 0.20cmx0.20cmx4.5cm/0.08"x0.08"x1.77"(Approx.)2.1mm: 0.21cmx0.21cmx4.5cm/0.08"x0.08"x1.77"(Approx.)2.2mm: 0.22cmx0.22cmx4.5cm/0.09"x0.09"x1.77"(Approx.)The Length of the Blade: 23mm/0.09"(Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension differences due to different manual measurements.Package Includes:1 x Drill Bit