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. 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 ensures compatibility and efficiency in maintaining 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 ideal 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 not only saves time but also extends the life of your chainsaw with its 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 uses around your workshop. Slight color difference Color: gold Material: Emery Package Contents: 21 x Chainsaw Diamond Sharpener Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.