Features 1、Adopts tungsten steel material for high hardness and strength, resistance to corrosion and rust. 2、Unique mirror polished treatment for smooth and perfect surface, reducing the risks of burning and deviation. 3、2‑flute bit with cutting edge is of sharpness, no burrs on surface, provides more efficient working. 4、Ideal tool for milling and engraving details part, can be used for carving and marking on wood, MDF, aluminum, and acrylic. 5、Ergonomic design, simple operation, high work efficiency, time‑saving and labor‑saving. Specification Item Type: Engraving Bit Material: Tungsten Steel Color: Blue Specification: 4 x 0.3 x 15 Tip: Approx. 0.3mm/0.01in Shank Diameter: Approx. 4mm/0.16in Total Length: Approx. 45-50mm/1.8-2in Purpose: Embossing / lettering / opening Application: Spring carving tools, CNC milling machines, end mills, etc. Package List 5 x Engraving Bit