The medicine cabinet comes delivered with 4 screws and washers for attachment under a wire shelf (or wire shelf basket). A tip is to mount the medicine cabinet before you mount the wire shelf. Step 1: Place the medicine cabinet on a table and place the wire shelf on top of the cabinet (in the position where you want to have it). Make sure that the 4 screw holes on top of the cabinet are placed under gaps between the wires and that cabinet doesn't protrude outside the sides of the wire shelf. Step 2: Place the 4 washers onto the wire shelf, directly over the screw holes in the medicine cabinet, and fasten the screws with a screwdriver. Step 3: Mount the wire shelf onto the brackets.