Harrows come in several varieties - ones with discs and ones with fixed teeth. A chain harrow looks like a section of chain link fence but on one side it has teeth several inches long. A chain harrow drags behind your tractor. It is relatively light weight and can be pulled teeth up or teeth down. A chain harrow can be pulled with an ATV, golf cart or tractor. I would be a good tool for grooming a beach I suspect.