^^ whs.
no good for big projects and the sort, but good for cleaning up and small interior projects etc. i've got a dremel (got the best one, about 3 years ago) i'm yet to use it on anything on my car, but i've used it for small sheet metal cutting (thin intricate stuff) and its alright.
but before you buy, you've just got to accept that they're all weak as piss and i wouldnt use them for drilling, especially not metal anyway (too fast, not enough power).
perfect for polishing small-medium items, etc.
if you want to drill, buy a drill. if you want to cut large amounts or thick metal, buy a grinder and a few cutting disks.