Builder Special Passage (non-locking) style glass Fluted knob set with tubular latch in Polished Chrome. Perfect for closets, dens, nursery or other rooms where a lock is not needed. Complete set comes with two glass knobs, tubular latch mechanism, standard rosettes, striker plate and mounting hardware. Rosette plates measure 2.5 inches in diameter (63 mm) with a screw spacing of 2 inches (50 mm). Rosette plates are designed to screw into the wood door and these are not made for standard doors with a bore of 2 1/8 inch. The latch mechanism is a standard 2 3/8 inch backset and approximately 3.2 inches (81 mm) long. The glass knobs measure 2 (50 mm) inches in diameter and it has a projection of 2 1/8 (54 mm) inches. Can only be used on doors that have a thickness of 1 3/8 inch. These wonderful style crystal door knobs sell elsewhere for up to $100.00. Available in Brushed Nickel, Polished Brass and Polished Chrome (Dummy and Passage styles).