Transponder keys in Houston, Texas: These are the keys that most people think of when they try to picture what a key looks like. They have either two or four sets of teeth. If you want to make sure that you have a very durable and safe key, then opt for a four-sided key as opposed to a double-sided key. The two extra sets of teeth will make the key much more difficult to pick. This is a great, inexpensive way to improve the security at your home or your office without having to install a new home security system. …