You are Buying a brand New And Factory Sealed Guard Security 1990 Tubular Door Lock Entry Set with Keys, Polished Brass Finish This door lock knob fits all standard doors with a 2-3/8" or 2-3/4" backset and the non-handed design accommodates either right- or left-handed operation. Easily lock or unlock the door knob lock from the exterior of your door with the included keys. A simple turning mechanism locks or unlocks the door knob from inside. This door lock comes in a neutral, polished brass finish that will easily complement a range of interior and exterior doors and fixtures. The classic tulip door knob shape fits comfortably in the hand and adds a timeless accent to any exterior home door.