[One set of composition] 20PCS (two sets) drill bits 0.8 1.0 1.2 1.5 1.8 1.8 2.2 2.2 2.5 2.8 3.0mm. 40PCS (two groups) 0.3mm 0.35mm 0.4mm 0.45mm 0.5mm 0.55mm 0.6mm 0.65mm 0.7mm 0.75mm 0.8 mm 0.85 mm 0.9 mm 0.95 mm 1.0 mm 1.2 mm 1.3 mm 1.4 mm 1.5 mm 1.6 mm[HSS Coating]: The drill bit is made of high-quality HSS steel, which is durable and anti-rust.[Use] It can be used for drilling alloy steel, wood, non-ferrous metals, cast iron and hard plastics.[Screwdriver] There are many different uses for electric hand drills because these tools are different. Precise drilling on small, fragile or important items.[Reminder] The manual punching tool is a manual tool that replaces electricity. Twist drills cannot be used for hard objects such as steel, iron and stone.Colour:Black+silverMaterial:HSS steelPackage Contents:1 * manual drill60 * twist drillsOnly the above package content, other products are not included.Note: Light shooting 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.