The Mammoth 800 is mammoth (hence the name) 4 head, gear driven, planetary and counter rotating unit. A authentic surface prep grinder and a concrete polishing machine all in one impressive unit with more bells and whistles than competitive machines that cost double. The Mammoth 800 features: 15/20 H.P. Motor, 220 3 Phase, with a 31.5" sweep, a 8GL water Tank and weighs in at 1102 LBS. The Mammoth 800 is also available in self propelled and remote controlled models.