Cannot be used. There was a video online showing the use of a power tool with a Dremel. The end of the shaft is too big to accept a 1/8" Dremels collet and too small to fit my router's 1/4" collet. My flexible handle from my Dremel didn't fit in the head of the tool either. I tried using an electric drill but at around 700rpm it was ineffective. So for most people in the US I rate this as a waste of money. I'm sure it will cost more than sending it back to the seller in China