With a smooth, round rose that mirrors its cylindrical knob, the Bonn knob makes a subtle statement in contemporary settings. Function (Passage): Passage style knobs and levers are used to provide a transition from one room to another. Both sides of the hardware are always free and have no locking mechanisms. Perfect for hallways, closets, guest rooms, or anywhere that doesnâ€™t require a lock. Features an adjustable backset of 2-3/8 inches or 2-3/4 inches. Fits doors from 1-3/8 inches to 1-3/4 inches thick. All hardware required for mounting is included.