Robust and durable: the chainsaw sharpeners are made of durable material of high quality plastic for maximum wear resistance and durability, the chainsaw sharpeners are mounted inside the sharpener of rod to keep chain and guide rods oiled, reducing friction and extending life. Efficient sharpening: The saw chain sharpener is made of 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 perfect alignment. Press the tip of the sharpener against a firm surface and youll 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 perfect alignment between the stone and the forest. The handy tool offers an easy and portable approach. Satisfaction Guaranteed: Dear friends, thank you for purchasing our chainsaw chain sharpener, and sincerely hope that you will receive satisfactory service and high quality products from our store. If you have any questions, please contact us as soon as possible, we are still waiting. Full money back guarantee or free replacement if you are not satisfied with our teethers Happy shopping