Yale Locks 82 Deadbolt Nightlatch 60mm Backset DMG Finish BoxThe Yale 82 deadbolt nightlatch front door lock has a deadbolt operation only with no intermediate latching action and it is opened by a key from the outside and a turn handle operation from inside. The 82 deadbolt nightlatch has a 60mm backset, this is the measurement from the edge of the door to the centre of the keyhole. Locks with a 40mm backset are normally used where there is restricted space, such as on a narrow glass. This Yale 82DMGPB has a