Most cheap locks work on a similar premise. At my last building, my apartment key could open two other doors on my floor and the floor above. And I once stole

Most cheap locks work on a similar premise. At my last building, my apartment key could open two other doors on my floor and the floor above. And I once stole a bike by accident because the owner had the same color and model, and brand of lock, and my key worked! I thought the lock was a bit stiff, and the seat felt odd, but I didn't figure out what had happened until the next day.