I still use my USA made IR 231, funny thing is it only has 450 or 500 ft.lb of torque (not break away) listed but it will remove stuff some newer and supposed more powerful air impacts wont. It seems like 40 years ago they were a little more honest with their claims.I have one. It's not on par with the big boy Dewalt impact I have, which is mostly useless (like bringing a tank to a squirt gun fight), but it seems to do just fine for most fasteners that normal people would need to deal with....lug nuts, axle nuts, etc. I'd say it's equivilent to the 1/2" ingersoll pneumatic gun I've had for the last 30 years, which does just about everything I've ever needed it to do.