Item Type: Twist Drill Bit Set Material: M35 cobalt steel Purpose: Drilling stainless steel, die steel, aluminum alloy, high carbon steel, cast iron, wood Point Angle: 130 Product Specifications (mm): 1.5/2/2.5/3/3.2/3.5/4/4.5/4.8/5/5.5/6/6.5 Size: Approx.1.5mm / 0.06in 2mm / 0.08in 2.5mm / 0.1in 3mm / 0.12in 3.2mm / 0.13in 3.5mm / 0.14in 4mm / 0.16in 4.5mm / 0.18in 4.8mm / 0.19in 5mm / 0.2in 5.5mm / 0.22in 6mm / 0.24in 6.5mm / 0.3in Package List 13 x Twist Drill 1 x Plastic Box 1Highquality material, forged with M35 cobaltcontaining steel, tip is quenched and heat treated. 2With 130drill point double relief angle design, the cutter head can cut more sharply and can cut a variety of materials. 3Accurate grinding technology, good wear resistance, strong and durable, very practical. 438large vortex angle design, enlarged chip flute, smoothly and flat high temperature nonstick knife. 5Round shank chamfer design, clear steel stamp marking size, easy to distinguish drill diameter when using.