The key trapped in the Solenoid Lock in the default position.
The Solenoid must have a Push Button in line to energize the coil.
Press push button and the key to remove.
When the key is put back in the lock and turned 90 degree it will automatically be trapped.

Locks are manufactured from brass and all springs and screws are stainless steel.
Each lock has a Serial No. for easy replacement of keys or system extensions.
Locks are engraved and colour coded for easy system flow.
All locks carry a 5 year warranty.