Wafer keys are a type of key used primarily in the security industry. They are flat, thin pieces of metal that have a specific pattern cut into them, allowing them to fit into corresponding locks. These keys are often used in commercial settings, such as hotels and offices, where multiple locks can be operated with a single key. The design of wafer keys is based on a system of wafer tumblers inside the lock. When the correct wafer key is inserted, the tumblers align, allowing the lock to turn. This mechanism provides a simple yet effective way to secure doors and other access points.