Description: 10pcs Drill Bits can be used for your plastic, wood, or metal (such as aluminum or copper milling). Carbide PCB Drill Bits are designed for CNC / PCB milling machine for precise cutting. Features: 1.For drilling components lead wire holes in printed circuit boards. 2.Suitable for drilling aluminum, fiberglass, circuit board, wood and most plastic including acrylic. This powerful and useful tool pack contains 10 pcs which can provide great convenience for your 3D Printer Nozzle Cleaning. 3.Great for drilling PC Boards, Plastics, Fiberglass, Wood, Soft Metals, etc. These drills can be used on CNC Machines, micro milling or drill machines, drill presses, or hand held tools 4.Tip spiral flute carbide drill bits with sharper cutting edge, reduce cutting force and prevent drill broken, improve the drilling accuracy. 5.Carbide tipped drill bits with high hardness, high wear resistance, high strength, resistance to bending, anti‑impairment and long tool life. Specifications: Cutting Edge Diameter: Approx. 0.8 mm Cutting Edge Length: Approx. 8 mm Shank Diameter: Approx. 3.1 mm Overall Length: Approx. 38 mm Tungsten steel blade, welded iron body Package Includes: 10 x Drill Bits .