Adoption of the round shank design makes these engraving bits easy to use and widely compatible. With tighter clamping and less slippage, the vibration resistance and cutting speed have obviously improved.Sharp tips of the engraving bits are not easy to collapse, so that the processed products have no burr and chip, which can greatly improve the efficiency and quality of work. tungsten steel material provides better wear resistance and strength for high speed cutting.The engraving bit is 26mm long, and the shank diameter is 3.175mm.These engraving bits can be used on engraving machines, CNC machine, and various high-speed engraving and milling machines for processing materials such as acrylic, PC, density board, plastic, glass fiber board, PP board, medium fiber board, copper, aluminum and other soft metal materials.Item Name: Engraving BitsMaterial: Tungsten SteelColor: Silver Shank Type: Round ShankNumber of Flute: 2-Flute Cutting Angle: 20, 30, 45, 60, 90 DegreeFeatures: High Precision, Long-Lasting, Abrasive ResistantSize Details: Length: 26mm/1.02" (Approx.)Shank Diameter: 3.175mm/0.13" (Approx.)Storage Case Size: 5.5cm x 5.2cm x 1cm/2.17" x 2.05" x 0.39" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:10 x Engraving Bits (2 of Each: 20, 30, 45, 60, 90 Degree) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin