ARROWMAX Mini Twist Drill Bits Set, Size Marked, 0.5mm 2.3mm, Titanium Coated High Speed Steel Micro Bits, 2.35mm Shank, Hole Drilling Tool for DIY, Jewelry, Amber, Beads, Copper, Wood (Set B)

Specification: Shank Type: Round Shank; Tool Flute Type: Spiral; Twist Drill Bits Diameter: 0.5mm-2.3mm; Shank Diameter: 2.35mm / 0.09-inch; Total Length: 45mm Material: Made of high-speed steel, with high hardness and stable operation. The drill bit is titanium coated, which has higher wear resistance and lower friction coefficient. Not easy to accumulate chips and long service life. Cooling: Adapt to several kinds of cooling conditions, for example oil mist, water, oil, air cooling. Design: 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 is proper for electric drill, hand drill. Suitable for DIY resin, amber and wood drilling.