Rock Monster HD backreamers from Ditch Witch are equipped with EdgeGuard protection that incorporates placement of tungsten carbide discs on critical areas of the bit shirttail. High Energy Tumbling inserts improve cutting structure life through increased fracture toughness and wear resistance. The backreamers have interchangeable nozzles in multiple sizes, creating customizable fluid-flow specifications to specific drilling conditions. They are also armed with a premium sealed journal bearing and have standard API thread connections. 800/654-6481; www.ditchwitch.com