Pin Vise and Dremel

Dremel makes a smaller pin/vice collet that threads on the end of their tool -look in the dremel accessories

With one of these #4486 Chucks you can use even the smallest bit in a dremel. Example here (but may not be lowest price): http://www.amazon.com/Dremel-4486-MultiPro-Keyless-Chuck/dp/B0000302ZV

My . You better be able to cut the speed of the moto-tool Waaaaaayyyyyy down or else you're going to break a lot of bits. If you have a speed controller for it you are probably OK.

Jim

How many holes are you needing to drill?

You can wrap the drill shank with masking tape to enlarge it enough to be sufficiently tight enough in the collet. But again Dremels spin way too fast for bits that have a hair like diameter.

All pin vises are not created equal, some are better than others. 

The chuck posted is the one I meant .And yes my dremel goes real slow -lowest setting -this is crucial,sometimes I will stabilize the drill and pull or push the part onto it.