Residential Electric Door and Gate Operators Commercial-Industrial Trolley type-ceilling, Wall Mounts, B1-Parting, Sliding Doors Electric Operators Waterproof Trolley Type-Ceillling and Jack-Shaft-Wall Mount Explosion-proof Trolley Type-Ceillling and Jack-Shaft-Wall Mount Sliding Gate Electric Operators Swing Gate Electric Operators Trafic control barriers To control of vehicular traffic in private and public parking areas. Rolling &Fire Doors Rolling Service Doors & Fire Doors. Jack Shaft - Wall Mount Accessories Different accessories for your needs Safety Devices Reverse Systems and Sensor Entry-Exit Devices Loop Detectors, Card Reader and more Operating Controls   Modifications   Special applications   Key Switches Push Buttons Stations with OFF/ON Momentary-contact, spring-return key-switch used for opening and closing residential garage doors, where radio transmitter is not available. Part No. 22150 Momentary-contact, spring-return key-switch in "waterproof" enclosure will open and close door/gate/barrier. Recommended application: apartment buildings. Note: Operator must be prewired for open/close devices. Part No. 50030 Momentary-contact, spring-return key-switch in "tamper-proof" enclosure will open and close door/gate/barrier. Has weatherproof housing for exterior application. Part No. 22251