I've got one I picked up at a model show nearly ten years ago. It has a
worm gear and you push down on the top half, which spins the bottom
half. It comes with several collets, like a Dremel tool, and will hold
any micro-drill size, and a few of the smaller standard drill sizes.
It's been a constant tool box companion, without fail for years.
I got it from some tool supplier who had a vendor table at the
show, and I have no clue who they were or who made the tool, but I'm
sure a little research can turn it, or a similar product up.