John Falle, in Jersey, Channel Islands, UK is one of the world experts in the design of covert entry tools. His company sells these tools and training courses to government agencies everywhere. His tools are also sold by Wendt in Germany, and MBA in the United States.

The Government Edition of Locks, Safes, and Security features many videos with John and Marc Tobias, detailing the design and use of his specialized picking, impressioning, and decoding tools.