Hi, Has anyone had any experience with these? http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=43367
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93004
or for welding
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=94128...