CoCud Micro PCB Drill Bits, 1/8" Shank 0.3mm-1.2mm Cutting Edge, Print Circuit Board Drill Bit - (Applications: for CNC Drilling Engraving Machine), 2-Set (20-Pieces) - cuf220728dd0311

• ★ PCB Drill Bits Size --- Cutting edge diameter (CED): 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm. cutting edge length: 5.5mm, 7mm, 7mm, 9.5mm, 10mm, 9.5mm, 10mm, 10mm, 10mm, 10mm. shank diameter: 3.175mm / 1/8". overall length: 38mm / 1-1/2". ★ Wide Applications --- Widely used for drilling PCB (print circuit board), acrylic, plastics, aluminium, soft metal, fiberglass, wood, etc. Suitable for PCB drilling machines, engraving machines, CNC and high precision special drilling equipment. ★ Sharp Cutting Edge --- Sharp cutting edge provides smooth drilling, low cutting force and drilling accuracy to prevent tool breakage. Large chip removal space, smooth chip removal, and low drilling heat. ★ Tungsten Carbide --- Tungsten carbide tip has high hardness, good toughness, wear resistance, high strength, resistance to bending and heat resistance, providing a precise and easy experience. ★ Useful Tips --- The mini drill bit is too tiny and easily twisted off. Be careful and control your CNC speed. The longer the chuck clamps, the better. The positioning ring reduces machine set-up time and increase efficiency.