Break Glass For Key

Break glass for key is a safety device, typically a wall-mounted box with a glass front, designed to provide quick, emergency access to an important key. In an emergency, a person breaks the glass to retrieve the key for unlocking an exit, fire-related equipment, or other secure areas, and the devices are often red and labeled for high visibility. The box is made of durable plastic with a breakable cover, and replacement glass, hammers, and chains are often available separately.