Description x000D__x000D_This is a professional 40pcs drill bit set. It includes drill bits with tip diameters of 0.5mm, 0.8mm, 1.2mm 2mm, each size comes with 10 pieces. Industrial grade high-speed steel for higher durability and sturdiness. Suitable for drilling in tough material, including aluminium, cast iron, brass, copper, magnesium alloy, plastics, etc.x000D__x000D Feature x000D__x000D- Color: Silver_x000D- Material: High Steel_x000D_- Bit diameter: 0.5mm, 0.8mm, 1.2mm, 2mm.x000D- High-speed steel with coating treatment, tougher and more abrasion resistant for longer working life and high work efficiency.x000D- Round design drill bits, accurate and fine, increase drilling speed.x000D- Mainly for drilling wood, plastic, fiberglass, printed circuit board, and metal including copper, aluminum, tool steel, cast iron, and heavy-duty abrasive alloy metal, etc.x000D- for home DIY, building and engineering use etc.Packing list: 40 x Drill Bit