Atlas Copco SB hydraulic breaker attachments work in confined spaces and, says Atlas Copco, hit harder and faster than predecessor models. New in the line are the 183-pound SB 100 and 275-pound SB 150 for use on smaller carriers (in the 2,425- to 9,900-pound weight class). Maximum impact frequency is 2,280 bpm. Both breakers operate at a pressure range of 1,450 to 2,175 psi, with the SB 100 requiring an oil flow of 4.2 to 9.2 gpm, and the SB 150 requiring 6.6 to 10.6 gpm.