Description: [Material]: The Hexagonal shank grinding wheel grinding head is made of high quality chrome corundum, with strong hardness, not easy to deform, finely polished and meticulously carved. [Feature]: Hexagonal shank grinding wheel grinding head, the grinding head made of brown corundum, good texture, strong wear resistance. [Product Use]: The Sharpening Head is widely used for grinding and engraving workpieces such as jade, jade, ceramic glass, cemented carbide, and gems.Suitable for metal, machinery, wood products, bearings, etc. [Design]: Exquisite design to increase contact surface, improve grinding efficiency, and no dust pollution. [Easy to Use]: Direct Fit, Easy installation,and Simple to use. Specification: Material: brown corundum Shank diameter: 6.35mm Size Chart: 7.1cm/2.80inch 7.9cm/3.11inch Package Includes: 2 Piece Hexagonal Shank Grinding Wheel Sharpening Head(6 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.