The diogram here shows the physical appearance of the most common types of house keys we convert. There are literally hundreds of different key types available around the world, what's common in the United States may be uncommon in Australia. At Switchkey we can custom fit practically any key blank to fit our fobs, however we tend to list several of the major makes for ease of use. Don't see your key listed? Feel free to contact us and we'll see what we can do.