Can I change the backset on the Alfred DB series? Blair April 10, 2019 19:42 Follow Yes, the DB series' backset can be changed between 2 3/8" (60mm) and 2 3/4" (70mm). Related articles What tools do I need to drill holes? Can I keep my existing mechanical deadbolt installation with my Alfred DB series lock? Do I need to drill holes in my door? Comments 0 comments Please sign in to leave a comment.