The slat roll is used to support the mattress and/or box springs. Our slat roll slats are made of select solid wood that is machined accurately with softened edges and are counter-bored which allows them to be screwed down to the bedside rail. The slats are held together by high-strength webbing material. We are doing things our competition is not doing. With all of these quality features, you are not only getting a great product but a superior product.