The RX series upright rammers are built for compacting materials ranging from mixed and cohesive soils to heavy clay. The low profile, lightweight design makes them suitable for backfilling, narrow trench compaction, and foundation and masonry base preparation. The three models feature four-cycle Honda engines. The impacts per blows vary from 2600 to 3400 pounds, at 600 to 750 blows per minute. The four-point isolation and vibration-reducing grips also minimize operator fatigue and prolong the life of the machine components. Ingersoll-Rand, 877-472-7263,