What is it and how is it used?

I’ve got a question for the group.  I picked up a DeWalt tool at a yard sale several years back.  At first blush, it appears to be a heavy duty ratcheting screw/nut driver.  But, there is more to it than that.  Nested in the handle, there is a hardened pin.  The pin can be removed to be placed through a perpendicular hole in the handle.  The butt end of the driver has a steel cap so it can be struck with a hammer.  Beyond the obvious, what is this tool and how is it used?  Thanks. 

 

I have pictures but, they are on my computer, not a URL.

 

Welcome to the forum.

 

Save a kiloword and post a picture.

Thanks.

Thanks for the images.

 

It looks like an old style impact tool.

 

Preload for loosen or tighten, then whack the end, causing rotational torque to be applied.

I can imagine it being used as you say, except wouldn’t an impact tool be designed to  only rotate a little bit?  Why would you need full directional ratcheting.  And, where does the pin come into play and why does it have the hole in the handle to place the pin perpendicular?  The pin appears to have drywall or concrete dust on the tip.  

Maybe a ratcheting driver w/ a tee handle for added leverage?

It isn’t clear if it is a thread tapping tool like a ‘tapmatic’ or a spring loaded prick pumch.

 

I have a What Is it question… What is it? I know it is an all in one shop power tool but
What vintage, What manufacturer and Did it have a drill press opposite the band saw???