The grinder was purchased for processing hardwoods (oak, beech). The machine does an excellent job with rough grinding and finishing polishing. I use 3M and Chinese circles (I took a sample, a brand for the domestic market). Velcro holds great. If you do not connect a vacuum cleaner, then it is better to work outdoors or in a respirator, it blows a lot of dust through a rag bag. Overall impressions are positive, I recommend.