the super walmart by me uses photo technology on their key cutting machine...they stidck the original in a slot...it takes a picture of the original...then they stick the blank into the slot and the image of the original id transfer3ed to the blank....the issues ive had with this technology is alot of the time the new key doesnt work upside down and downside up....that bugs me...but i could see how the butt side of the key wouldnt come into play