Specifications:
Cutting Edge Diameter: 0.4mm / 0.016", 0.5mm / 0.02"
Cutting Edge Length: 6.5mm / 0.26", 7mm / 0.28"
Shank Diameter: 3.175mm / 1/8" (approx.)
Overall Length: 38mm / 1-1/2" (approx.)
Cutting Edge Material: Tungsten Carbide
Shank Material: HSS (High Speed Steel)
Package Included: 10pcs x 0.4mm PCB Drill Bits, 10pcs x 0.5mm PCB Drill Bits

Descriptions:Suitable for drilling and engraving PCB, acrylic, plastics, fiberglass, wood, aluminium, soft metals. Fit for PCB drilling machines, engraving machine, CNC and high precision special drilling equipment.
Tungsten carbide tool is high hardness, good toughness, wear resistance, high strength, resistance to bending and heat resistance. Carbide can run at higher speed than high-speed steel. Carbide material with good milling and cutting performance, can ensure high work efficiency.
Sharp cutting edge provides smooth cutting, reduces cutting force and prevents drill broken, improves the drilling accuracy. It has good cutting strength and drilling effect. Spiral chip space design for fast and clean chip removal.
With sharp cutting edge, milling groove and clean surface, these tool sets work quickly and cleanly, no glitches or scrap left. Long-lasting bits are made from tungsten carbide for precise and easy experience. The longer the length of the tool clamped by the chuck, the better.
Carbide PCB drill bits replace your CNC machines and any hand held tool. Large drill bit chip space, chip resistance, chip smooth, small drilling heat. Tips: The drill bits are too tiny, so it is very fragile for handling. Please be careful and take good control of your CNC speed.