This item is very good. The different sizes are just what I needed for the Warhammer 40k miniatures. The 2mm and 3mm are exactly the size of the magnets I use in my models and it's VERY handy. My only complaint is that it's a bit small and it hurts your big hands to use it. Compared to the heavily inflated version of the Citadel, it may be small and awkward to use for advanced drilling, but it's easier to open. If I had to choose between this one and the Citadel, I would choose this one. But honestly, you should be able to adapt any drill bit to any hand drill, so that's a moot point. I have this for various and printed drill bit sizes and it's great for that.