The Yale 77 Series Traditional Nightlatches are the Original Yale Lock with classic styling. The deadlocking snib function enables the latch to be held back or deadlocked internally. The nightlatch is key operated from the outside and has a knob handle for operation from inside. The 77 Series Nightlatches have a 60mm backset, this is the measurement from the edge of the door to the centre of the keyhole. Supplied with 1109 external cylinder.Select Option Brasslux 60mm Backset VisiBrasslux Finish 60mm Backset BoxChrome Finish 60mm Backset BoxChrome Finish 60mm Backset VisiNickle Brass B Cylinder 60mm Backset BoxNickle Brass SC Cylinder 60mm Backset BoxPB Cylinder 60mm Backset Visi Add to Basket Quantity