FeaturesEASY INSTALLATION: Install your knob set in a flash. All you need is a door and a tool set! No need for professional door fitters, you can do it yourself!DUAL SIDED: No need to buy two — this diamond glass knob is double sided, suitable for both left handed and right handed doors.ONE SIZE FITS MOST: This door knob fits 1-3/8" to 1-3/4" doors. The function of the lock is Passage, means it's best suited for doors that you want to latch but do not lock in any way. Typically Passage door knobs are used on hallway or closet doors.DIAMOND SHAPE: It’s not just a door knob — it’s a statement piece. These gorgeous diamond glass door knobs with matte black rosettes are sure to add a touch of sophistication to your home.