Chicago Pneumatic construction air breakers are found on mostjobsites you need to break up some concrete. A standard in the industry theseunits come in 35, 60 & 90 lbs breakers. Because of their high airconsumption typically these are run off a pull behind air compressor puttingout 90 or 185 Cubic Feet Minute (cfm). Mufflers are available which can quietthe tools slightly but these are going to be loud tools no matter what. CP concrete breakers are well priced and very dependable with proper maintenance. Ideal tools for concrete or asphalt pavement demolition, for help selecting the right chisels and bits contact the pros at 800-242-4424.