The Spy Bolt is a real-life KGB spy gadget you can buy right now. It’s essentially an updated and improved version of the old Soviet KGB ‘dead drop’ hollow bolt that enabled agents to smuggle or conceal whatever can fit in the little bit of hollowed-out space. The O-ring seal keeps your belongings safe from the elements, while this new version uses a 3/4″ diameter bolt to provide more storage space Product page. Continue reading for a video review and more information.
The bolt had has reverse threading to provide additional security. You’re also able to choose from two sizes, with one offering 2.8 cubic inches of space, and the bigger size giving you 4.4 to work with. More information.