Keyless Electronic Deadbolts do not require a key to enter, but you can use one if you wish. Keyless deadbolts are generally used in conjunction with a doorknob or lever below. Keyless deadbolt locks are programmable so you can create your own custom code for locking and unlocking the door. This is a great soluction for a secure home and not worrying about losing keys.

See Also:
Single Cylinder Deadbolts | Double Cylinder Deadbolts | Single Sided Deadbolts