I have used one of these, and was surprised at how well it worked removing
lug nuts from my friend's 3/4 ton Ford pickup.  He bought one to speed
roadside tire changes and thought it was broken because the motor would spin
but the socket did not.  I figured out by accident (big dummy feeling that I
am used to) that it has a flywheel inside that has to build up enough RPM
before a clutch engages and drives the socket.

Mike Snow

Hi Volks:

JC Whitney sells these 12V impact wrenches - they sound like a great idea.
Supposedly go to 250ft/lbs.

Has anyone ever used one of these puppies?