What kind of key blank should I use if I need more keys? Blair April 10, 2019 20:20 Updated Please use the SC1 key blank for additional keys. Related articles Is my Alfred DB series Smartlock waterproof? What wireless functions does Alfred support? What features are included with the Alfred Z-Wave lock? How many scheduled PIN Codes can I create? What purpose is the button on the back of the Alfred lock? Comments 0 comments Please sign in to leave a comment.