ARE YOU HAVING PROBLEMS WITH THE LOCKING OF DOUBLE ACTION DOORS ?GB LOCKING SYSTEMS HAVE THE ANSWER WITH THERE UNIQUE DS3000 HIGH SECURITY LOCK.The unique rollerbolt mechanism and angled strike plate enable the lock to resist up to 1 tonne of side load and yet still release under side pressure making it a genuinely fail-safe device exceeding the requirements of EN13637. The lock is also mu