A simple 8mm square key for cupboards in utility rooms.

Print it with 3 perimeters on a 0.4mm nozzle or 2 perimeters on a 0.6mm nozzle and 0.2mm layer height. Print low and slow - this is a tiny model and it can overheat quickly. Quality of the print doesn't matter much though - it will work either way. A bit of sanding might be required.