Features 1、Made of tungsten steel material, high hardness, high strength, corrosion resistant and rustproof. 2、Using a unique mirror polished treatment, the surface is smooth, reducing the chance of burning and deviation. 3、Wide range of applications, it can be used for carving and marking on wood, MDF, aluminum, and acrylic. 4、Ergonomic design, simple operation, high work efficiency, time‑saving and labor‑saving. 5、Compact size, lightweight and portable, easy to install and convenient to use. Specification Item Type: Engraving Bit Material: Tungsten Steel Color: Blue Specification: 4 x 0.3 x 25 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