A double-walled safe with German quality double-sided key lock, which can be replaced by mechanic or electronic numerical locks as well. Thanks to the inner heat insulation it provides partial protection against fires. With the manufactured fastening points the safe can be fastened downwards to the floor and/or backwards on the wall. Due to its size and weight the furniture safe can be easily placed. Its inner size makes it suitable for storing A/4 binders vertically.