Yale 99Z cylinder nightlatch is a traditional style nightlatch which is ideal for low security doors. The latch-bolt is withdrawn by handle from inside and key outside. the interior snib is used to hold-back or deadlock the latch rendering the lock inoperable by key or knob. Supplied complete with a cylinder and 2 keys. Finish: Black With Polished Brass Cylinder. Height 66mm, Width 92mm. Backset 60mm. Depth 25mm. Projection 20mm. Latchbolt is easily reversible on site. Reverse strikes available to suit outward opening doors.