EDIT:

I designed the second version where you can use a hex head M6 bolt as a handle, Print: Pin for m6 bolt, m6 head, and insert, it screws nicely together. It doesn't add any strength to the lock, it just looks nicer :) 

I needed a simple lock just to keep the doors closed, so why not design it and print one, (actually I needed 3 ;))

This lock is fully 3D printed and doesn't need gluing or other parts (you need screws to mount it)

I printed it using these settings:

0.4mm nozzle

0.16mm layer height

3 walls

35% cubic infill

no need for support

all models are in the right orientation to print.

Just put in your slicer and print :)

hope you like it.

I put 2 of those on my shed and the hold very nice, check test video: