The Tessi 6410 shutter lock is usually installed in the centre of the door. Both side arms extend when operated, these are linked to the shutter's locking bars, these lock the shutter into both sides...
The Avantis is a relatively new lock and is easily recognised by it's unique latch and deadbolt configuration. Avantis locks have the largest hooks on the market at 25mm. This is the composite door ve...