A cryptex is a portable, puzzle-like container, typically cylindrical, that stores a secret message or items behind a combination lock.

This cryptex looks like a Mark 2 hand grenade, with four numbered dials that make up the main shell of the grenade. Similar to my other cryptex on MakerWorld, it has ratcheting encoding rings that can be used to set any 4-digit passcode you want! And turning the dials is super satisfying thanks to the ratchet!

There are three different versions of the dials you can print:

• Plain — No numbers at all if you want to paint them yourself
• Inset numbers — The numbers are inset holes on the dial
• Embedded numbers — The numbers are embedded and can be painted in the slicer

If you add a small spring to the fuse, you can make the safety lever, "spoon", to pop off when the pin is pulled, just like in a real grenade!

Printing tips: The parts are already oriented optimally. Inner cylinder, Fuse and Safety lever need supports. Use tree supports for the Safety lever.

If you're using Orca Slicer or Bambu Studio, a handy project file is included that has my print settings and painted parts ready to go!

Assembly You'll need an optional spring, 0.5x5x25mm recommended, for the safety lever action. But the cryptex works just fine without it, it's just a little fun bonus! You can also use a keyring for the safety pin ring, or use a printable ring.

No other hardware required to assemble! If you have printed the bolt tool included with my previous cryptex on MakerWorld, it will also work for this installation! If not, the tool is included here as well! Or you can use a flat- or hex head screwdriver too.

See the included assembly guide video!

If you enjoy my designs and want to sell prints of them, I have membership tiers with commercial license available! Also if you want to support me while getting access to all my premium designs, I have a cheap personal tier. Please check out my membership plans! ❤