When you lock a door using the doorknob lock, you can usually lock the door from the inside or the outside depending on when you think of doing it. But when you are leaving your home, a deadbolt can only be locked from the outside.
Can you put a deadbolt on a bedroom door?
While installing a smart lock may be the best way to keep your front door safe, it’s not always the best option for a bedroom door. Most smart locks are designed to only work on a door with a deadbolt, and most bedroom doors don’t have one. There’s at least one model of no-deadbolt smart lock on the market, however.
How do you lock a door with a penny?
To penny lock a door you simply jam pennies between the door and the hinge from the outside, which prevents the door from opening from the inside. If done properly, the only solution is to remove the door from the hinge. While penny locking a door can work, it will only work with certain door jams.