Anyone have any actual experience using one of these things? They're not cheap, but it looks like it could save the day with removing rusted, frozen bolts and nuts. And not overheat everything around it, like what happens when you use a torch. They have cheaper models, along with cheaper links to this one. But this is the only one I could find that was short enough to hot link.
https://www.nationaltoolwarehouse.c...Ws7mY5SUAD6NZZGbcVu-Nu3u_20aAr32EALw_wcB
https://www.nationaltoolwarehouse.c...Ws7mY5SUAD6NZZGbcVu-Nu3u_20aAr32EALw_wcB