The rollers deliver excellent compaction to all types of gravel and asphalt ... MORE PRACTICAL GRD800, different to most of chain or belt driven rollers on the market, is with a fully hydraulic-drive system ... travel and vibration, eliminating regular maintenance and adjustments that chain driven rollers require. ModelGE-R800HGE-R800HCGE-R800DEnginePetrol, Honda GX390Petrol, Loncin 200FDiesel, ...