H12 is an induction heater which can release a powerful heating metals instantly,  equipped with a strong refrigerator excellent cooling system, can support a very big heating power with energy saving. It is applied directly to heat the metals ( steel ,  aluminum  and copper )  no need to disassemble nearby heat-sensitive components. Chassis, axles, joint reinforcements,  bolts, clamping rings, pins and heavier steel parts can be heated up for loosening simply,  adjusting or straightening.