2,900 Series – 1/4” NPT inlet, Built-in power regulator, Pin-type socket retainer, Twin Hammer mechanism, Integral muffler, Pressure-feed lubrication system, Built-in lubricator, Durable epoxy-coated handle
2,700 Series – 1/4″ NPT inlet, Built-in power regulator, Pin-type socket retainer, Twin Hammer mechanism (except for 2903P1), Steel hammer case, Durable epoxy-coated handle, Pressure-feed mechanism lubrication
MAX Series – 1/4” NPT inlet, Built-in power regulator, Pin-type socket retainer, Twin Hammer mechanism, Composite housing, Titanium hammer case (Ti models), Reverse-biased motor