K611=The economical air hammer for fast cutting action, especially for medium exhaust system, panel cutting, and general repair work.  Delivers up to 3,500 blows per minute. Handles a range of cutting applications. Longer life alloyed steel barrel and heat-treated piston.  Furnished with accessory kit which includes an edging tool, tailpipe cutter, straight chisel, cutting chisel and a punch.  

K711=An economical air hammer with a longer piston stroke, this standard duty air hammer is designed for exhaust work, bolt cutting, and front end work  Handles tough cutting jobs with its longer stroke piston. Alloyed steel barrel and heat-treated piston for longer life. Trigger control and a built-in power regulator give you full control of the speed and power of up to 2,000 blows per minute.  Furnished with accessory kit which includes an edging tool, tailpipe cutter, straight chisel, cutting chisel and a punch.