Nostalgic Warehouse Meadows Plate with Keyhole Waldorf Crystal Knob, Mortise - 2.25", Satin Nickel 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 Standard 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. Complete set including mortise lock and skeleton keys 2 3/8 inch standard back set. Coordinates with Nostalgic Warehouse's Premium Grandeur line Standard 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