DTH Class*, 4.0" - 7.0" up to 140'ft Deep Without Reloading Carousel*, And Greater Depth with Reloading*, CAT 3406E (C15) Tier-II Turbo Charged After Cooled Diesel Engine, Carousel Holds Six Rods 20'ft long, Onboard Sullair Air Compressor Capable of operating at 900 CFM @ 500 PSI, or at 1050 CFM @ 350 PSI