Briton 3934 electromagnetic door closers ensure safety and convenience. Ideal for keeping high traffic areas free from obstruction to enable smooth passage, making them the perfect solution for care home bedroom doors or school corridors. At installation each unit can be set to either `hold open’ or `swing free’ operation. When de-activated via a connection to the building fire alarm or smoke detection system, the electromagnet disengages and the door closer closes the door from any position in the normal manner to prevent a fire from spreading.