Feature:1. High‑quality material, forged with M35 cobalt‑containing steel, tip is quenched and heat treated.2. With 130°drill point double relief angle design, the cutter head can cut more sharply and can cut a variety of materials.3. Accurate grinding technology, good wear resistance, strong and durable, very practical.4. 38°large vortex angle design, enlarged chip flute, smoothly and flat high temperature non‑stick knife.5. Round shank chamfer design, clear steel stamp marking size, easy to distinguish drill diameter when using.Specification:Item Type: Twist Drill Bit SetMaterial: M35 cobalt steelPurpose: Drilling stainless steel, die steel, aluminum alloy, high carbon steel, cast iron, woodPoint Angle: 130°Product Specifications (mm): 1.5/2/2.5/3/3.2/3.5/4/4.5/4.8/5/5.5/6/6.5Size: Approx.1.5mm / 0.06in2mm / 0.08in2.5mm / 0.1in3mm / 0.12in3.2mm / 0.13in3.5mm / 0.14in4mm / 0.16in4.5mm / 0.18in4.8mm / 0.19in5mm / 0.2in5.5mm / 0.22in6mm / 0.24in 6.5mm / 0.3in Package List:13 x Twist Drill1 x Plastic Box