Nostalgic Warehouse BN22-CLACRY-OB Classic Rosette with Crystal Double Dummy Knob, Oil Rubbed Bronze Traditional mounting for vintage or new doors. Two Dummy Knobs. Coordinates with Nostalgic Warehouse's Premium Grandeur line For use on interior doors that require only a push/pull function. Mounts directly to door. Mortise lock versions available for vintage doors 3-Year mechanical and finish Warranty Forged Brass Genuine Lead Crystal Knob Full 3-Year Warranty Oil-Rubbed Bronze Finish is "living" and will wear with use over time Standard door thickness range is 1-3/8-Inch to 1-3/4-Inch