uxcell Drill Bits Set, 0.3mm Tungsten Carbide Engraving Micro PCB Drill Bit 10pcs, 0.4mm High Speed Steel Twist Drill Bits 10pcs - f22030300ux0152

• Drill Bit Size: Cutting edge diameter: 0.3mm / 0.012", 0.4mm / 0.039". shank diameter: 3.175mm / 1/8", 0.4mm / 0.039". overall length: 38mm / 1.5", 20mm / 0.78". Sharp cutting edge provides smooth cutting, reduces cutting force and prevents drill broken, improves the drilling accuracy. Wide Applications: 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: 0.3mm tungsten carbide PCB drill bits have high hardness, good toughness, wear resistance, high strength, resistance to bending and heat resistance. Carbide material with good milling and cutting performance, can ensure high work efficiency. High Speed Steel Tool: 0.4mm high-speed steel drill bits have high hardness, good toughness, high wear resistance, suitable for most general purpose applications. It has good cutting strength and drilling effect. Spiral chip space design for fast and clean chip removal. 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. Large drill bit chip space, chip resistance, chip smooth, small drilling heat. Drill bits replace your CNC machines and any hand held tool.