Review on CML Supply Micro Drill Chuck by Jacob Andreti

I bought this to drill holes in baked (cured) balls of polymer clay, pendants etc and it does the job, even on objects, which are coated with UV resin that is cured. I knew from other reviews that the size of the drill bits is not listed; I use a drill jig to determine the size of a particular drill bit. I think it would be easy to put the dimensions of the drills on the little plastic tubes that hold the drills in the big box. It's actually harder to figure out which chuck (out of 4 since 2 are double ended) to use with a particular drill bit. Just looking at a chuck doesn't tell you how tight it is when screwed into a vise with the bit inserted (although one is significantly larger than the others). Since it is a hand drill, I would like the manufacturer to pay a little more attention to ergonomics. While the part of the drill that you hold between your fingers is knurled and therefore non-slip, it would be better to have a rubberized surface for more comfort. And the end that sits on the palm isn't rounded (like a hemisphere, which would be more convenient); In fact, it is hexagonal around the edges with a circular indentation on the surface. Can't rate durability as I just received it yesterday.