Dial type fireproof safe! The operation of turning the dial to the right and left to align the numbers is a highly secure and reliable model. The effective lifespan of a fireproof safe is 20 years after manufacture. While fireproof safes are often thought to last indefinitely, the moisture in the aerated concrete used as fireproof material can evaporate over long-term use, reducing its fire resistance. The Japan Safe Association recommends replacing fireproof safes every 20 years as a guideline for security review.
