The Ultimate (with caretaker) mortise lock from Austral Lock are created for hinged security doors featuring a patented pivoting beak and jemmy resistant deformable strike plate.

The Ultimate security doors have caretakers which increases occupant safety. The security doors are compatible with the U-Kit (cable) and HD16 (cable) multipoint kits.

The security doors' patented pivoting beak for jemmy resistant plate provide enhanced resistance to forced entry and the interior snib lever provides for quick and convenient locking without the need for a key.

The Ultimate model fits into industry standard door cutouts and suits both left hand hinged and right hand hinged doors.

The Ultimate security door locks must use AA8 Cylinder.