I ran across this tool the other day - a drill-chuckthatis designed to beattached to an impact wrench:

It is produced by this guy:
http://www.cowanchuck.com/
but I'm not at all sure where it is manufactured.

The videos on that siteof the thing in use are pretty impressive.

Because I've got to drillsome holes in concrete in the near future and I already have a powerfulRidgid impact wrench,

I am seriously considering buying that chuck.

Do any HAF membershave any experience with this particular device, or any other brandofimpact-wrench drill-chuck attachment? If so, please report howit worksfor you.

Thanks.