Just the perfect amount of security for light duty, this beautiful tubular construction satin chrome storeroom door lock complies with ANSI A156.2, series 4000, grade 2, (400,000 cycles), UL listed for 3 hour fire door, ANSI A117.1. It features a 6 pin SCC keyway with two nickel keys per lock, door range: 1 3/8" to 2"; backset: adjustable 2 3/8" to 2 3/4" standard; and strike: T strike (1 1/8" x 2 3/4") standard.