The wafer tumbler lock was developed as a low-cost lock that offered a reasonable degree of security to the owner. These locks are make up over one-fourth of all the locks in the world. The outside of the lock resembles the pin tumbler lock (yet to be discussed), but uses a much simpler mechanism.
Wafer keyways usually have simple side ward indentions. The key is usually shorter than that of other locks, but equally broad. It may be cut on one or both sides.
Though harder to pick then the warded lock, the wafer lock is still easy to circumvent. This is an excellent lock to practice on because the techniques required to pick it are applicable to the pin tumbler lock as well.
You are going to get an insight on the different ways to open wafer tumbler locks by means of like raking, picking, vibration picking by reading this document.