Cat hammers deliver high blow energy and frequency, which means more breaking power on the job. The H75Es delivers 1,356Joules of energy at 840 to 1,650 blows per minute. The H95Es delivers 2,034Joules of energy at 700 to 1,260 blows per minute. The H75Es and H95Es hammers feature a gas-fired system, said by Cat to maintain constant power between service intervals. The E Series housing is also said to be made for strength. A curved front and back profile is said by Cat to eliminate stress points and transfe