Astro Pneumatic Tool 4980 0.498" Shank Super Duty Air Hammer/Riveter Maximum power air hammer for heavy duty off-road, industrial and automotive applications Remove or install rivets in I-beam suspension and work site equipment, heavy duty servicing of truck bushings, springs, king pins and more Speed: 1800 RPM Bore: 3/4-inch Stroke: 2-11/16"