Specification: Cutting edge diameter (CED): 0.75mm; cutting edge length: 8mm / 0.31"; shank diameter: 3.175mm / 1/8" (approx.) overall length: 38mm / 1-1/2" (approx.). Long Tool Life: With high hardness, high wear resistance, high strength, resistance to bending, anti-impairment. Made from Tungsten Carbide for precise, easy experience. Spiral Flute Bits: Tip spiral flute drill bits with sharper cutting edge, reduce cutting force and prevent drill broken, improve the drilling accuracy. High Precision: With sharp cutting edge, milling groove and clean surface, these sets of tool work quickly and cleanly, no glitches or scrap left. Great Use: Great for PC Boards, Plastics, Fiberglass, Wood, Soft Metals. Fit for: PCB drilling machines, engraving machine, CNC and high precision special drilling equipment.
