This model can be used to create a depth stop for old indoor keys to stop the key from overpenetrating the lock area.
Print with a filament of your choice.
Currently there is only the model KeyDepthStop_KeyWithFlatPortion, that can be used with a key, that has a rounded shaft up front, but a flat shaft in the back.
I am looking into creating another version of this model for completely round key shafts.
Use 3-4 outer walls for strength. Print with tree support.
The author marked this model as their own original creation.