[Easy & Fast Sharpening] Simply fix the chainsaw sharpening jig onto the saw guide board by rotating the 3 black buttons. Fix the sharpening rod in the handle and insert it into the blade through the guide hole. Rotate the button on top to adjust the position of the fixture to make the sharpening rod more closely aligned with the blade. Then, rotate the handle to sharpen the chain. The chainsaw can become and efficient in just 3-5 seconds and slide the chain to repeat for next blade. [Chainsaw Sharpener with 5 Rods] This chainsaw sharpener has new design based on the old version. It's made of rust-, high-hardness stainless steel alloy material, which is and sturdy. The position of the sharpening rod fixed on the crank can be adjusted to make full use of the rods. There are two different directions guide holes, which can improve the accuracy of the cutting angle. It comes with 5 sharpening rods, allowing you to replace them at any time. [Extensive Application Jig] This chainsaw chain sharpener designed standard 45° sharpness angle which can ensures the angle of all tooth sharpening. It can be used for 8-22inch chain saws, fit for most chain saws. for lumberjacks, garden workers, father, friends, husband., Weight: 0.8267334825 pounds, Manufacturer: NONDK