Air Hammer, 2000 BPM, 3-1/2" Stroke. The 117 standard air hammer has a longer piston stroke than other hammers in the series. It is designed for exhaust work, bolt cutting, and front end work. Reliable: Ingersoll Rand promises tools that last, and this hammer is no different. You can count on it to perform the same way every time. Comes with a 1-year warranty.2,000 Blows Per Minute: This hammer has a built-in power regulator that allows you to completely control the speed and power output of your tool. Longer Life: To ensure a long life for your tool, it has a heat-treated piston and an alloyed steel barrel.