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Nine original mechanical puzzle locks, all made from real brass and designed by Boaz Feldman.

Each one looks like a normal padlock. None of them open like one. The challenge is hidden inside the mechanism itself. No hints, no instructions, just the lock and your brain.

Puzzles range from a two-hour beginner challenge to the Loki, which takes an average of 18 hours to solve. Every puzzle comes with a fabric carrying bag and an instruction card.

Not sure which one to start with? Read the full buyer's guide here:
How to Choose the Right Puzzle Lock