My daughter hold a diaries since few years and writes them on a classic book. She thinks that this actual boyfriend read them. So she ask me for create a lock system for her Diaries.

It a simple system you need to print it twice for cover and back.
You will need glue. (PVC type)
You won't need support.
You'll need to buy a little locker like the picture.

For better security i used cyanolyte glue for band supporte and PVC glue to assemble system locker.

Creality

Ender 3

Doesn't Matter

No

2.0

30