Building Your Own Cryptex

From Instructables user Boston09, comes this ingenious little combination safe built from PVC pipe. Just align the letters to spell out the combination and it pops open to reveal the secret compartment inside. What a great project for a kid of any age. Learn how to do it here.


  1. Not bad at all - but its only 5 rings - what happens if you have 6 rings each with the letters a to z and 0 to 9 - thats a blast as it makes over 2.5 billion different combinations - plus if you have the right tool then you can change it as many times as you wish.
    Still as I said a great piece of work - like my Cryptex

  2. Charlotte - Sweet! Thanks for that!