While a deadbolt can be effective on its own, it actually works best in tandem with another type of lock – whether that’s a smart lock, a lock in the door handle, or some other alternative. This is because the deadbolt will likely be on the top half of your door. The other lock will be below that. The two locks, in tandem, will help to maintain the integrity of the door, even if someone tries to get in through the part of the door that is furthest from the deadbolt. Not only that, but if one of the locks fails, the other one can pick up the slack and keep your home protected.