The lock on the photo has a very straight opening.
I'm not sure most of us can print the half-diamond thin enough to be of much use.
Considering that you usualy use thin spring-steel for the picks.
As far as printing a spanner goes...3 seconds and a used up windshield-wiper already gets you the best spanner you can have.
It's good work but I just don't think that a 3d printer is the right tool for this application and that
other tools are better for this job.