Unmonitored. The PH900 unmonitored double door handle magnet is 2503mm in height and cleverly hides the armature plate in an enclosure that acts as a door handle. This electromagnetic lock is designed for inward opening doors and is to be installed on the door frame vertically. It is most suitable for metal doors and door frames and has a holding force of 2 x 600lbs (545Kg).. Non monitored. Fail unlocked. Holding force 2 x 600Lbs (545Kg). Hidden magnet design