I made this for a coworker who was frustrated with people closing the door to areas he was working in while getting things from his vehicle.

It's a simple design, the part is inserted into the door latch and it prevents the door from shutting fully. There's a hole in the bottom corner of the base of the part to attach a keychain ring, string, or small chain if the user wants to keep it hanging near a door where it's frequently needed.

Printed at 100% infill with 3 walls and 0.2mm layer height, but you could almost certainly print this at lower densities to save material. Unless someone is slamming the door, lower densities should be fine.

Supports are needed, I used the default in Bambu Studio, and this should work in PrusaSlicer without issue as well.