The Induction Innovations 12V Mini-Ductor, No. MD-500, is the re-engineered version of its flameless torch. The Mini-Ductor is completely portable and it works with a standard 12V battery pack or off a car battery. This tool can be used to heat ferrous and some non-ferrous metals without the danger of an open flame using invisible heat, according to the company. The Mini-Ductor removes thread lock compounded nuts, frozen manifold bolts, bearings and more. It can also turn a 3/4” nut red hot in 15 seconds