Fire-Lite FM996-L8 FM Series Electromagnetic Door HolderFM Series electromagnetic door holders are designed for vir tually any remote door release application. They are primarily used to hold fire and smoke barrier doors open until released by a remote smoke detector or other switching device. The complete assembly consists of: an armature contact plate with adjustable pivot mounting for installation in the door, and a heavy duty electromagnet, in a durable plastic enclosure, mounted on the wall or floor