if you have a 3D printer it denies saves you a trip to the hardware store

plus you could print fun… novelty keys. ( ͡° ͜ʖ ͡°)

you could even print them from dissolvable filament so that if your idiot guests lose them outside they’re likely to dissolve in the rain

or maybe there is such a thing as self destructing filament that doesn’t require water? like some kind of heat activated depolymerizer that takes a few days to break down after printing. that could be really useful for like an AirBnB