Sentry Safe F2300 Lost Keys. 4.6 out of 5 stars 75. It is proven fireproof by underwriters laboratories.

(model numbers will begin with 0500, 1100, 1110, 1150, 1160, 1170, 1710, 1900, 1950, 1970, 1200, 1210, 1250, 2100, 2180, 2275, 2460, 6000, 6720, 7150, a3750,. The f2300 provides protection from both fire and water. If the key turns but the top doesnt open then the spring loaded mechanism has become loose in the back of the lock.