Model 138-22A is a drawer safety lock is a device designed to prevent a drawer from being opened. Its primary purpose is safety and security, most commonly to stop young children from accessing the contents inside. They are also used in commercial or office settings to provide a basic level of security for valuable or sensitive items.

The core function of any drawer safety lock is to mechanically block the drawer from sliding out on its rails, either by latching it to the cabinet frame or by obstructing its path.