This device seems overpriced due to the weak plastic clamps and screws. Good thing I watched the video for using the device because I did not find the written instructions to be very clear. When putting the device on the mower for the first time I broke the head off of one of the plastic screws when I tightened it. That left me with only one clamp to hold the device on. Fortunately it still worked. I tested the lawn mower afterwards and device does work, the blades were sharpened. Still I think this is overpriced. It would be more durable if the clamps and screws were both metal.
This product works great. I was able to sharpen the blades on my Scott’s Classic reel mower quickly and with little effort. The written instructions that came in the box were not specifically designed for the Scott’s reel mower but I watched the YouTube video on this page and followed the instructions there. After I sharpened the blades I gave them a light coating of WD-40 to help keep them from getting rusty.