3.5 - 4.5 Inch Class Rock Drill* Hd715 Drifter W/ 2961 Percussion Hours (only 84 Hours Since Rebuild)* New Cummins 6ctaa8.3-c Diesel* Low Fuel Consumption / Low Emissions- Cummins Installed June, 2012 This Ew Model Is Standard W/ A Boom (and Operator's Seat) That Can Swing A Full 90 Degrees From The Line Of Travel. Holes Can Be Drilled Parallel To The Machine While Tramming Forward Which Greatly Reduces Maneuvering Time And Wear And Tear Of The Undercarriage.