The cutting wheel on a dremel is only thin and wont take any flex so if you put pressure on the disc flat face it will shatter if you see what I mean, I don't think you'll have any trouble using a dremel just take your time don't put too much pressure on and try different speeds if your dremel has adjustable spreeds, Ohh and a waver/disclamer signed first is the best way to go and don't forget once that bolt is cut that big heavy taps going to drop