... 4:High efficiency high frequency heating quenching furnace for auto parts shaft Heat treatmentVarious kind of automobile parts, motorcycle ... tool, drill bit, knives, saw bit, saw teeth, steel pipe, copper pipes, braze welding. SmeltingGold, silver, copper, aluminous and ... :1, various hardware tools, hand tools. Such as pliers, wrench, hammer, ax, screwdriver, scissors (gardening scissors) and the ...