Bulldog Vertical Rod Panic Exit device combine durability with extreme value. These Exit device are manufactured to the highest standards using the finest materials available. Each device fit standard 161 door prep (2-1/8" hole and 2-3/4" backset) and feature stainless steel springs, durable Pullman Latch Chassis, black coated steel strikes, non-handed designs and available in 36 or 48" widths. F-Rated device also feature a 3 hour fire rating, Recessed bottom strike, and through bolts. All Bulldog exit device meet or exceed ANSI/BHMA Grade-1 standards. From the Manufacturer Bulldog Vertical Rod Panic Exit device combine durability with extreme value. These Exit device are manufactured to the highest standards using the finest materials available. Each device fit standard 161 door prep (2-1/8" hole and 2-3/4" backset) and feature stainless steel springs, durable Pullman Latch Chassis, black coated steel strikes, non-handed designs and available in 36 or 48" widths. F-Rated device also feature a 3 hour fire rating, Recessed bottom strike, and through bolts. All Bulldog exit device meet or exceed ANSI/BHMA Grade-1 standards.