Locate the studs along the wall with a stud finder and mark them with a pencil.
Measure your cabinet and subtract 1/4-inch from the total measurement.
Cut the cabinet brace using the above calculated measurement with a hand saw.
Determine where you'll place the cabinet and mark a straight line the length of the cabinet with a level. This will ensure ease of installation of the brace.
Install the brace into the wall with 1-inch wood screws and a power drill, placing screws into as many studs as possible.
Slide the cabinet brace onto the wall braces.
Slide the cabinet onto its braces and verify that it is level.
Install any cabinet doors, drawers and shelves according to your manufacturer's guidelines.