... high-frequency hardening heat treatment, for example: vice, locking pliers, spanner.hydranlic components: for example:the plunger, rotor, reversing ... through thermal forming.hardware tools diathermy,for example : pliers and spanners heating-diathermy-forming.prospecting drill rod taper shank ... Melting capacity can be from 3KG to 300KG. 2KG small size high frequency induction copper melting furnace