• The Briton 389 series is an emergency exit device with mortice Nightlatch. A surface mounted push pad emergency exit device operating a mortice cylinder Nightlatch. 

• Dual profile cylinder mortice Nightlatch accepts euro and oval profile cylinders (cylinder not supplied). 

• Nightlatch can be operated from outside by cylinder or the other outside access device. Anti-thrust prevents forced latch retraction. Is easily reversible on site. 

• For use on fire and smoke doors up to 1300mm wide, 2500mm height and maximum door weight 200kg. 

• Testing – Is fire tested to EN 1634 on timber doors to achieve a 2-hour rating and 4 hours for metal doors. UKCA marked to EN 179 (1121-CPR-ABB7573). CE marked to EN 179 (2812-CPR-ABB0020). Certifire Approved (CF5506). Environmental Product Declaration in accordance with ISO 14025 and EN 15803.