The Tessi 6410 roller 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 of the frame for increased security. The lock case is installed on the inside of the door with the barrel protruding through the door to allow key access.
|Center (Bolt Shoot Both Sides)
|Keyed To Differ