Sharpener Diameter: 4.8mm/ 0.18', Sharpener Length: 22mm/ 0.86, Total Length: 45mm/ 1.77'. Made of emery grinding head, grinding effect is good, fine uniform, fine carving, hard not easy to wear, reusable, durable. The chainsaw sander can be used instead of a file so that your chain can be as sharp as before and you don't need to remove the chain when working. High precision cutting edge with suitable negative front foot design, taking into account cutting edge strength and sharpness. With the distribution of diamond particles on the chainsaw bit, these chainsaw blades grind the chainsaw stably and efficiently. There is no need to worry about the burr of the file being worn out. After many times of grinding, they remain reliable and stable. You can polish without removing the chain, saving time and effort and increasing efficiency.