FAST : Because there are full and evenly distributed particles on the chainsaw , these files can sharpen the chain saw chain steadily and efficiently. Only a few minutes, rid of troublesome hand sharpening once and for all. DURABLE: The latest, hardest titanium-plated Diamond Wheels we'e ever made, adopted titanium plating process, which means you will enjoy 20% lifetime of these than others non-titanium-plated. EASY TO USE: These are specially designed for Electric Chainsaw Sharpener. Only 2 steps to replace. By the way, this titanium-plated files have harder , which reduces the number of you have to replace it. Note: There may be many black spots on the wheel surface. It's not that the titanium coating has fallen off, that the titanium and silicon carbide mixed. This is better for using. SUITABLE: 5/32 inch wheels for small 3/8-inch,1/4-inch chainsaw chain and other small blade. Material:Emery colour:Gold Package Contents: 8 * Burr grinding stone file 5/32 inch Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.