Of course, Ohio USA.
yes, 6 and 8 inch are available according to the web page. but only cast iron, not aluminum.
My answer may sound non-technical but I can hang suspended off the ground holding onto the 24", 36" and 48" wrenches. I have done this many times in tightening and loosening pipes and the wrenches show absolutely no signs of misuse. I weigh 175 pounds. I guess you could do the math: 350 foot/pounds for the 24", 525 foot/pounds for the 36" and 700 foot/pounds for the 48". This would still not be the maximum these wrenches could deliver.
3" to 5" capacity, but will go up to 6" in a pinch.
Life warranty against jaw components failure, but not the body, as I understand it.
Thanks again for your patience. I have verified that this tool is 100% sourced in the USA. Please call us if you have any other questions that we can help you with. 1-800-4RIDGID
Hi, they are made out of 4140 steel.