The Spy Bolt is an updated and improved version of the old Soviet KGB dead drop inches 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 inch diameter bolt providing a larger storage area than the original. Its secret storage compartment has a diameter of .49 inch and a maximum depth of 2.7 inch . Overall length is 3.43 inch .
Very cool item.
- Made from an actual bolt
- Reverse threaded head for added security
- Inside chamber is 1/2" diam. x almost 3" long
- Exterior is 3/4" diam. x 3.75" long