Can I keep my existing mechanical deadbolt installation with my Alfred DB series lock? Blair April 10, 2019 19:41 No, regular mechanical deadbolts are not compatible with the DB series. Related articles Is my door suitable for installation? Can I change the backset on the Alfred DB series? What wireless functions does Alfred support? Do I need to drill holes in my door? Handing Switch Comments 0 comments Please sign in to leave a comment.