Simply fix the brackets to the underside then position the shelf over the radiator without any drilling or fiddly diy when in place the shelf creates a visually attractive wooden surface to display ornaments photos and so on but theres more to it than just looking good the shelf deflects heat from the radiator back into the room rather than up the wall so you feel warmer and minimise energy wastage it also significantly reduces heat staining above the rad and stops dust and fluff collec