We do alot of drilling and not as much milling. We are on the lookout for a set of drill bits that all have the same size shank to fit our collets, we have a 1/4 & 1/2. We talked with McMaster Carr, they had mentioned a hex set of bits, I assume like the quick change kind and find an adapter that would fit the collet. I didn't know if anyone else had done/does this?? I thought it might be too much for the adapter to hold the bit... I should add we mainly work with plastics and aluminum.