Hey Everyone, I hope your builds are going better than mine! Ha, ha! Anyway, before I got a better resolution shot of Immortan Joe's chest, I actually thought a chuck key with the teeth ground off might have been the base for the chain hanger thingy. http://www.amazon.com/Stone-Tools-O...id=1443081850&sr=8-3&keywords=small+key+chuck Heh, heh. I used to have one of these myself but lost it. Now that I got a better pic, it looks like an amalgam of 3 different parts layered, not including the spring of course.