Safes can be bolted to the wall, this will greatly increase its security. The method is as below:

1. Find the place where the safes is placed and open the safe, find the two reserved holes in the safe, draw a circle with a pencil, and remove the safe.

2. Use an electric drill to drill two holes against the drawn circle (the drill bit should be about the same size as the expansion screw that you bought with the safes).

3. Move the safes to the set position, and the holes on the back of the safe are aligned with the holes punched on the wall.

4. Screw in the expansion screw and then installs the nut.