I wanted to make my own Swiss Army style keychain. Warning, this one is a little larger then I would like, I have a couple ideas to make another one even smaller. I thought I'd share anyways for those that are interested.Use 3 3mm socket cap screws (length depends on how many keys you want to use) and nuts (sized for nylocks), assorted washers. You can replace the included spacer with washers or some sort of tube to act as a spacer in the middle hole if you want different spacing. Using washers will make the keys easier to pull out and get a decent snugness. But you could lose them if you wanted a smaller overall thickness.