Mini vault/piggy bank is easy to assemble with a working lock.

Larger vault for MTG or other card boxes. Fitted for Ultra Pro boxes, holds 7 plus a dice bag.

All parts are test printed in PLA. It has a double planetary system, a scroll vise setup for the locking jaws, a rack bar combo lock. The hinge is removable.  The casing is press-fit together (used a 6" quick clamp). No glue or metal hardware. Everything printed with a 0.4mm nozzle, designed for a 0.2mm layer height. Jaws can make excellent pressure on the outer edges of the case. The center turn knob is removeable to make the safe harder to open.

2 tricky parts of the assembly are the jaws and the rack bar.

Jaws the order matters, they are arranged in order on the build plant. I recommend sharpie-ing numbers on the bottom of them (the upside on the build plate). The Jaws scroll grooves are long enough to align to the scroll ring before the case is pressed together. Align the jaws with the edge of their casing. Align the jaws before you press the case. 

The rack bar: get the 2 dials in place first in the unlocked position. Push the rack bar all the way to the end of its track (make sure the jaws are positioned with the edge of the door). 

Note: Pushing in the combo dial requires a little force, free spins once seated.

Two print profiles of piggy bank, a 4" deep case and a 2.75" deep case.

Print Profile for Magic Vault.