Features: Made of tungsten carbide with good cutting performance, ensuring high working efficiency. Sufficient bending strength, wear resistance, high hardness, high wear resistance and high strength. Sharp edges, can be used for milling holes, grooves and edges on plates and the process will be smooth. The well-polished surfaces are quite clean, neat, and there is no glitch or burrs on the shank. Many objects or materials can be engraved such as circuit boards, plastic, stainless steel and copper. Features: Material: Tungsten carbide (titanium coating). Shank diameter: 3.175mm. Cutting edge diameter: 1mm. Length: 38mm. Cutting edge length: 5.5mm. Quantity: 10. Package: 10pcs burs.