BARSKA breakable Key Boxes are a perfect accessory for any office or warehouse environment. These solid lock boxes help deter theft and provide employees with an emergency back-up option in the event that an important key needs to be accessed immediately. Barskas 3 piece set of replacement glass for your Breakable Key Box allows the lock box to be used over and over again in the event that the glass window was broken. These glass replacement windows have been designed to shatter in such a way that they do not create any sharp edges or points, which protects the user who is accessing the safe. These replacement windows install easily using the existing window channels located on the inside of the safes door.