The 35-pound-class CP 1210 handheld breaker from Chicago Pneumatic Construction Tools provides 20-percent more hitting power than previous models. The jackhammers require 59 cfm of air and deliver 1,400 bpm. Basic, silenced and vibration-reduced models are available with various shank sizes. Ergonomic improvements include a teasing throttle to ease operator stress at the start of breaking. An improved swivel coupling now allows swiveling action when pressurized.