there are less expensive chinese knock offs of the dynafile 2, however not sure I want to be the guinea pig since the dynabrade has a lifetime warranty on their tools now
I got one of those (China) at a yard sale. It is a smaller tool; came with a box of belts that look like scuff pads. It works OK; but really haven't used it that much. Might take a lot of practice to keep from gouging. However; it gets into places a circular won't