Case has introduced a new line of hammers, which includes the CH300, CH500, CH750 and CH1000. Impact energy rating ranges from 350 to 1,200 ft.-lbs.; and a narrow, rectangular shape allows the units to work in tight trenches or crowded demolition sites. The hammers have no high-pressure accumulators to change and maintain. Low-pressure nitrogen-charge cushions recoil on the rebound stroke, resulting in less wear on the carrier. Estimated list price: $5,000 to $85,000.