Various car key types are made up of a blade, the part of the key that enters and turns the car locks and ignition and the head. Prior to being cut to fit a lock the blade is usually referred to as a blank.
There are basically four car key types:
Also there are Flip blades, that are found on some remotes. This blade may be any of the four types listed depending on the vehicle make, model and year.
Each of these key types requires specialized skills and tools when considering car key replacement.