Robust and durable: the chainsaw sharpener is made of durable material of high quality plastic for maximum wear resistance and durability, the chainsaw sharpener is installed inside the sharpener to keep the chain and guide rod oiled, reducing friction and extending life. Efficient sharpening: The saw chain sharpener is made from sturdy materials and fine workmanship, which can be easily and quickly sharpened, and the operation is safe, saving you a lot of time and effort. EASY TO USE: The durable rod sharpener easily and quickly attaches to the end of the guide rod. Simply mount the bar mount sharpener to the guide bar. The double guide holes at the top of the guide rod ensure alignment. Press the sharpener tip against a firm surface and you'll have sharp, clean edges in seconds. Wide range of applications: This automatic chainsaw sharpener is suitable for 14/16/18/20 inch chain rods with two pilot holes. The two guide pins of the fixed shank sharpener ensure alignment between the stone and the knife. The handy tool offers an easy and portable approach.