Door knobs play a key role in keeping your home or property safe. They’re not only functional but also enhance the decor of a room. Design House 728857 Gateway Terrace Keyed Entry Single Cylinder Knobset and Deadbolt Combo exceed the criteria for BHMA Grade 3 certification. This single-cylinder keyed entry door hardware is locked and unlocked from the exterior using a key in either or both locks and can be locked and unlocked from the interior using one or both of the thumbturns. It is perfect for securing entrances, side doors, and anywhere else that needs a bit more security.