The Spy Bolt Covert Hidden Contents Secret Container
The Spy Bolt is an updated and improved version of the old Soviet KGB "dead drop" hollow bolt used during the Cold War. It features an O-ring seal for weather-proof storage of small valuables, communications, etc. It has reverse threading on the bolt head for additional security. This new version utilizes a 3/4" diameter bolt providing a larger storage area than the original. Its secret storage compartment has a diameter of .49" and a maximum depth of 2.7". Overall length is 3.43"