A wafer tumbler lock is a type of locking mechanism commonly used in various applications, such as doors and cabinets. It operates using flat, thin pieces called wafer tumblers that align with a key's unique cuts. When the correct key is inserted, the tumblers lift to a specific height, allowing the lock to turn and open. These locks are often favored for their simplicity and cost-effectiveness. They are less secure than other lock types, like pin tumbler locks, but are still widely used in situations where moderate security is sufficient. Regular maintenance can help ensure their longevity and functionality.