Lock'd In is Bryan's first puzzle lock, and it's unlike any other puzzle lock design. They are precision machined to incredibly tight tolerances from solid material at his home workshop. He describes the puzzle thus:
"How does one open a lock that has no key-hole? There are no buttons, no tools, and no magnets either... You'll have to rely on your keen senses to feel and hear the hidden parts inside!"
For a video review of this puzzle, check out Mr. Puzzle's video (spoiler alert!!)