This DC 12V Solenoid Electromagnetic Cabinet Door Lock can be used for locking sell-machine, storage shelf, file cabinet and etc.
 
The hidden way of unlocking can be used for an emergency.
 
The lock works as the circuits disconnects, and it will unlock as the instant power-on. It is steady, durable, and energy-saving and had a long lifespan.
 
After connecting the wires and when the current is available, the electric lock can control the doors opening and closing.