Features 1、Made of high quality tungsten steel material, has high hardness and strength, resistant to corrosion and rust. 2、30 degree engraving router bit of sharpness, features good carving and engraving performance. 3、Using a unique mirror friction treatment for perfect surface effect, helps reduce burning and deviation. 4、Nice crisp lines for fine detail work of engraving and carving, provides more efficient working. 5、2‑flute bit, ideal for carving and marking words on wood, MDF, aluminum, and acrylic. Specification Item Type: Carving Bit Material: Tungsten Steel Color: Silver+Blue Coating Specification: 4x0.4x30 Tip: Approx. 0.4mm/0.016in Shank Diameter: Approx. 4mm/0.16in Total Length: Approx. 45-50mm/1.8-2.0in Purpose: Used for embossing / Carving / Trepanning Application: Suitable for Spring Carving Tools, CNC Milling Machines, End Mills, Etc. Package List 5 x Engraving Bit