This is a another tool we can personally recommend.In fact we never ever touched our beloved dremmel again after. We have used this exact model for 3+ years now on an almost daily basis. It chuck allows for multiple mandrel sizes without changing collets. Its foot operated speed control allows maximum comfort and control while polishing. It comes with replacement brushes for motor although we have yet the need to replace so far after 3 years of use. It has hanging bracket on motor for easy placement and storage in your studio.