The 3130SE is a concealed in the door closer/holder designed to provide single point hold open for fire and smoke barrier doors. The door is held open until current interruption releases the holding mechanism and closes the door. The single lever track arm is designed for interior doors.
3133SE-STD 24V LH AL LCN Concealed-in-Door Closers
Standard Track Closer/Holder, 24V, Left Hand, Aluminum
$927.47