Product material: The small drill bit is made of HSS high-speed steel, which is sturdy and durable and will not be damaged after long-term use. Product packaging: The package contains 40 pieces of fully ground high-speed steel mini twist drills, with sufficient size. These beautiful and generous drill bits can meet your needs and are easy to use. Scope of application: The small drill bits are suitable for woodworking drilling, electronic product repairs, and household repairs. They can drill boards, plastic products, circuit boards, etc. Warm reminder: Do not drill hard metal materials. Please check the size information when purchasing. Description: Color: Silver Material: Metal Mini HSS Twist Drill Bit Straight Electric Drill Tool. Twist Drill Metric Hss Drill Bit Mini Drill Bit. Mini HSS Twist Drill Bit Set 0.5mm-2.0mm Model Craft Straight Twist Drill Bit. Applicable to: PCB, Thin Aluminum/Iron Plate, Thin Wood Board, Plastic: Straight Size: 10pcs 0.5mm10pcs 1.0mm10pcs 1.5mm10pcs 2.0mm Package Contents: 1 Set * Straight Twist Drill Bits Only the above package content, other products are not included. Note: Light and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowable error is +/- 1-3cm.