Door handles - An Overview
Normally a 2.five inch / 64mm latch or lock or a 3 inch / 76mm latch or lock is going to be good. The size of the latch or lock decides the backset and that is the gap from the sting in the door to your centre of your backplate to the door handle exactly where the spindle passes throughout the door. The backset on a 64mm latch or lock is approx 4