Integral noise mufflers on the KPB-series ergonomic paving breakers from Kaeser Compressors Inc., Fredericksburg, Va., reduces noise pollution and the risk of hearing loss. The KPB series is available in 50-, 60- and 90-lb models designs to reduce fatigue. A variety of tools steels such as chisels, points, asphalt cutters or ground rod drivers are available. The valves, pistons and other moving parts are made from shock-resistant steel.