401 to .498 size Shank Adapter. Use to adapt the .401 Flow-Forming shank to fit a .498 rivet gun, or to adapt TM Air Hammer Dies with .401 shanks to .498 Air Motors.: TM Technologies
AirToolsForLess.com - Astro Pneumatic .498 Heavy Duty air hammer
Amazon.com: Chicago Pneumatic CP717 - Air Hammer, Welding Equipment Tool, Construction, Heavy Duty, 0.498 Inch (12.7mm), Round Shank, Stroke 2.68 in / 68 mm, Bore Diameter 0.75 in / 19 mm - 1800 Blow Per Minute : Everything Else
Chicago Pneumatic CP717 Super Duty Air Hammer 1800 BPM (.498 Shank)
Astro Pneumatic Tool 4980 0.498" Shank Super Duty Air Hammer — 1SourceTool
Big Nasty Texas Twister™ Air Hammer Pulling Kit — Milton® Industries Inc.