The AL KO GW50 garden roller has a steel body and the ability to be filled with either water or sand making rolling of your lawn easy, or for simply pressing seeds down into the soil preventing them from being blown away or eaten by birds.Cleaning the scraper bar helps keep the roller clean from mud and any other debris attachedThe GW50 is water tight preventing leaks when filled with water or sandRobust steel body and frame that can be filled with water or sand