You will note that each corbel has two hanging strips on the back so
that they will hang on the head of a #10 wood screw that is anchored
into wood beam in the wall or if not not available a moly plug anchored
into a sheet rock wall will be sufficient. Be certain not to overload
the shelf so that the stress on the anchors will not cause the moly
plug to fail. When purchasing check the stress loads for the moly plug
that you are using. These range in different load bearing capacities.