Long Service Life Sharp cutting, smooth rotation, fast operation, high hardness, good wear resistance, greatly improves the service life, no burrs. Various Sizes 8mm - Shank Diameter: 3/4 - Cutter Height: 20mm 8mm - Shank Diameter: 3/4 - Cutter Height: 25.4mm. 8mm - Shank Diameter: 3/4 - Cutter Height: 38.1mm. 8mm - Shank Diameter: 3/4 - Cutter Height: 50.8mm. High Quality Material - Body Material: Solid Hardened Steel. Blade Material: Industrial Grade Micro Grain Carbide Widely Used Suitable for all kinds of cutting and engraving machines. Suitable for wood, MDF, particleboard, plywood and other compact panels. Use Can be used to form a wooden door, very sharp, sharp blade cuts smoothly without burrs, no burrs. The structure is simple and easy to use. For your daily carpentry work provides a lot of convenience. Note: The data are all manually measured, please allow an error of 1-3 cm, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.