Traditional mounting for vintage or new doors. Complete set including mortise lock and skeleton keys 2 1/4 inch standard back set. Coordinates with Nostalgic Warehouse's Premium Grandeur line Door thickness range is 1-3/8-Inch to 1-3/4-Inch This antique reproduction set is meant to replace skeleton-key lock boxes or for specialized new doors with a mortise box preparation 3-Year mechanical and finish warranty Traditional mounting for vintage or new doors. Two Dummy Knobs Coordinates with Nostalgic Warehouse's Premium Grandeur line Door thickness range is 1-3/8-Inch to 1-3/4-Inch This antique reproduction set is meant to replace skeleton-key lock boxes or for specialized new doors with a mortise box preparation 3-Year mechanical and finish warranty