This little polisher/grinder seems to be well made with decent quality material. It runs smooth without vibration. It is mostly assembled. You only need to attach the shields and tool rests. I haven't used it much so I can't say anything about durability. The flex wand for Dremel tools also seems to be good quality with a small box of grinding and polishing pieces. When I compared the ratings with a similar product at Harbor Freight this seem to be the best of the two. This company has a good reputation for their inexpensive products and tools.