Engineered to improve longevity in a variety of drilling conditions, the Ditch Witch® Rock Monster™ HD Backreamer features EdgeGuard™ protection, which increases bit life by protecting the seal and bearing. Patented High Energy Tumbling (HET™) inserts provide fracture toughness and wear resistance. The durable design maximizes weight on the bit, increasing productivity and performance. Plus, the Rock Monster is available with interchangeable nozzles in multiple sizes so you can customize fluid flow and maximize your effectiveness.