Robust Material: Crafted from premium quality emery grinding heads, our diamond chainsaw sharpeners deliver outstanding performance. They provide a smooth, uniform grind, excellent for fine carving and are resilient enough for reuse, ensuring durability and longevity. Versatile Sizes: This set includes three distinct sizes tailored for different chain saw types-4mm for electric saws, 4.8mm for small chain saws, and 5.5mm for large chain saws. This variety ensures compatibility and efficiency in maintaining various sharpening needs. Multipurpose Application: Perfect for a wide range of applications, from metal polishing to chain saw maintenance. These burr grinding stone files are also perfect for detailed grinding and carving on materials like jade, ceramics, glass, and cemented carbide. Enhanced Durability and Efficiency: Replace traditional files with our diamond sharpener that revitalizes chainsaw blades swiftly without the need to remove the chain. This method not only saves time but also extends the life of your chainsaw with its sharp, wear-resistant properties. Comprehensive Set: This package contains 21 pieces altogether-with seven pieces of each size (4mm, 4.8mm, and 5.5mm). This extensive set provides ample replacements for various sizes, catering to different uses around your workshop or at home. Slight color difference Colour:gold Material:Emery Package Contents: 21 x Chainsaw Diamond Sharpener Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.