Wrench Tip Inner shaft cut off on second use. I have and have used a flex shaft dremel for several years and have never had any problems, I thought I had upgraded to a better tool, WRONG, I upgraded to a more expensive tool. I could buy 10 dremels for the price of one. Don't waste money! It doesn't cut any better or faster than a Dremel. I've been using it for a full 2 hours and can't get any replacement parts. The seller emailed saying they would replace the inner socket 1 time as a courtesy but never sent or received. I ordered spare parts directly from the manufacturer and after 8 days the order was still not processed. I cannot stress enough how difficult it will be for you to obtain replacement parts for this unit IF it breaks.