This spring-loaded steel penknife has brass rivets and measures just over 1" long when it's closed. There's a notch where you can use your fingernail to open the very sharp blade. Don't try to wear this when you go through airport security, please. Seriously, we can't be held responsible for any mishaps with the blade. Be careful when it's exposed. A 22" brass chain is threaded directly through a hole in the knife's handle; there's no extraneous hardware on the pendant. Brass hardware at back.