I never use that tool. I usually just hold it by and and let one of my kids hit the trigger on the impact tool. Never had a problem doing it that way.
Done did a few of em.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe