Liftmaster 02409B NEMA 4 Key Switch, Best Cylinder Two Position Key Control Station
Outdoor Surface Mt. (NEMA 4/12)
Die cast metal enclosure with BEST cylinder (construction core included). OPEN/CLOSE spring return to center (OFF), key removable in center position only. Should only be used on operators wired for constant pressure to open and close (all LiftMaster industrial operators with type D control wiring).
WARNING: When used on most industrial operators, this control will not stop the door. Use another control that has a STOP button in conjunction with this control.