Will only work for the smallest of dies. In the demo video the dies are nested one behind another, but I found that they all fall out the second you take the card out of its case. Like another reviewer posted, I hope I can find another use for these cases.
Unlike the other reviewers, I'm very happy with these. I have the TT Stash and Store die and platform case, which has these pockets in it, and I have no problem with things falling out. I put the biggest dies in the bottom row and smaller dies going up the rows. When I take them out to carry to my table I suppose I tip them back the tiniest bit and nothing ever falls out. I bought this set because I needed more pockets for dies, so now I can use the little case they come in for carrying them to a crop or other event.
I've seen some other reviews of which there is a complaint of the dies falling out of the pockets. Yes, this happens, but If you use this system with the care you should with these delicate dies you should have no problems whatsoever. I'm not a fan of the sticky die storage for fear of bending me dies. In the end to each his own, but I find this system to be extremely secure.