Mine easily holds two large handguns and would probably hold at least one small one in addition. It is through bolted on the bottom and the side to a permanently affixed wooden interior divider in my closet. A determined burglar with time and tools could cut it out, but nobody is going to rip it out by hand or in a hurry.
I keep a revolver in a drawer in our bedroom. We have no children at home, and my wife is comfortable with firearms. I put that handgun in the safe only when we are going to be away or if we have young children in the house.
bttt