Cooling: The mini drill bits adapt to several kinds of cooling conditions, for example oil mist, water, oil, air cooling.
Material: Our micro drill bit set made of high-speed steel, with high hardness and stable operation. The jewelry drill bit is titanium coated, which has higher wear resistance and lower friction coefficient. Not easy to accumulate chips and long service life.
Design: Drill bits set use spiral flute design for quick cleaning of chips. The sharp cutting edge provides a smooth cut without glitches. Chip removal is not easy to stick to the tool.
Applications: This twist drill bits set is proper for electric drill, hand drill. Suitable for DIY resin, amber and wood drilling.