MiniTrencher GeoRipper GR520 20" Trencher - This GeoRipper has a 20" digging depth and is engineered for industrial performance. It is powered by a 74cc engine with a full 4.7HP perfect for everyday narrow trenching applications. GeoRipper provides a compact and efficient digging solution that is engineered to start easier and vibrate less. It is the ideal digging solution for irrigation, root barriers, landscape lighting, and other pipe and wire installations.