The backset is the distance from the front of the lock
to the centre of the spindle as shown here.
If you intend to use new locks on an existing door, replacing your old
ones, you will need to ensure the new lock fits into the hole in the door.
To do this, measure the backset distance of your old lock.
Our standard domestic locks are supplied with a 44mm
backset length, but we can also supply locks with a backset of 57mm.
Our commercial range of lockcases come with a choice of 57mm or 60mm backset.
If you require the 57mm backset lock please change the backset value before
adding to your basket.
For more help and information please contact us at firstname.lastname@example.org