Machine description: 4.5 - 5.5 Inch Class*, CAT 3412 Diesel Engine w/ Only 1,500 Hours Since Rebuild*, Runs 30"ft Drill Steel*, High Pressure Unit w/ On-Board IR HR2 1050 CFM / 350 PSI, New Pump Drive and Double Moto... more info about the 1993 Ingersoll Rand DML.