I have to divide this review into two parts. The tool itself is a great value for the money. It's well designed, easy to set up and use and the quality of the tool itself seems like it should cost more than it does. I've attached 3 pictures to demonstrate my point.First, the manual. If you open the back cover, page 9 is a parts list. Page 8 is what they title an "assembly drawing", what is usually referred to as an exploded diagram. If you look at the picture, what you get is a bunch or circled reference numbers that point to nothing. Only a problem if you need to order replacement parts.Second, an issue mentioned by at least one other reviewer. The sharpener comes very well and securely packaged. Neither the cardboard nor the Styrofoam were in any way damaged. However, the first thing I saw when removing it from the box was the damaged scale on the top rear of the base mount. It's a thin metal strip with rivets holding it to the frame, and was bent and torn between the 55° and 60° mark. I was going to return the tool at that point until I found that it's basically redundant and not necessary, as there is another scale on the inside vertical face of the base mount that does the same thing. The inside scale is dead on accurate; the damaged scale (riveted, it didn't move) was 5° off.That was the bad part. The good part is that once you get is set up, an easy and straightforward process, the tool works great. The motor is described as "commercial", and I believe it. It's quiet and smooth with almost no internal vibration. The switches are covered in clear vinyl, which will help keep the grinding dust out of them. I have both Husqvarna and Stihl saws, which use different chains. If you understand going in the pitch, gauge and different angles that your chain requires, it's all pretty straightforward (there is a chart in the manual). Use a Sharpy to mark your first tooth, and sharpening an 18" chain takes two or three minutes. It takes that long only because you have to
Zhang Tianqi1 
