One of the common mishaps with door locks is that either we forget or lost its key or the locks get too rusty to work at all. Both cases are a nightmare for the house owner. Losing the keys means you are stuck outside your home without knowing anything to do. When the lock gets rusty, either it stops working or the poor key breaks inside the lock. In both situations, it means you are left puzzled outside your home, irrespective of the weather outside – rainy, sunny, or breezy.