I use sterling silver chains. I have jewelry making tools but you could use small needle nose pliers and some hemostats. (you know, those surgical tools that can lock?) You'll need some type of cutters too, like wire cutters to cut the charms free. You'll want to keep the ring that attaches the charm to the key ring. Sorry if I don't make sense but you'll want to be sure that your charm will hang correctly from your chain. I don't have pics on this computer but when I get my laptop back from my son I'll post some pics for you.