Cal-Royal IND90-G2 26D Satin Chrome Indicator Deadbolt IND90-G2 26D. Indicator displays: Red (IN USE) and Green (VACANT). Lock Specifications: Adjustable 1-3/8″ (35mm) to 1-3/4″ (45mm) door thickness., Backset: Adjustable UL Listed 3 Hour Fire Rated 2-3/8″ or 2-3/4″., Deadbolt Faceplate: Standard 2 1/4″ x 1″ packed with ? plastic filler to convert 1″ face plate to 1 1/8″ wide door preparations. Strike Plate: 1-1/8″ x 2-3/4″ square corner. Includes 1 emergency key.