High-quality corundum material is used, which has high hardness, is resistant to wear, and offers strong durability. These chainsaw sharpener attachments are easy to install in just two steps. Align the carbide burr tab with the handle tab of the chainsaw grinder clamp and tighten with a wrench. The chainsaw sharpening accessory kit quickly grinds the chain in seconds, helping to improve work efficiency. Color: Silver Material: Corundum Size: 4mm Diameter: 6mm Package Contents: 10 x Chainsaw Sharpeners 1 x Wrench 10 x Nuts 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 actual item. Measurement may vary by +/- 1-3cm.