Briton 1413E Outside access devise with levers, euro cylinder not supplied. Suitable for both metal and timber doors. When locked ,the lever is disengaged from the mechanism and still pulls down therefore preventing unauthorized entry. When unlocked, the lever,spindle and mechanism engage allowing the shoot bolts,latch or Pullman latches to be withdrawn from outside of the door. Once the door is opened from the inside or outside the lever remains unlocked until re-locked with a key - The unit is NOT self locking. Lever variant is attached to the body by a shear pin. In the event of severe abuse, the shear pin will break protecting the mechanism, the shear pin can then be replaced.