Sometimes you need to deliver a secret message, store and hide an important substance/liquid/stash or maybe you need to store some backup passwords and PINs.  Why not hide it inside this spy bolt. It’s  an updated and improved  KGB “dead drop” hollow bolt used during the Cold War. Made from a real ¾” machine bolt, heavy, has O-ring seal for weather-proof storage and it has reverse threading on the bolt head for additional security.  Perfect place to hide your …valuables ;)