... 4. High Quality & Reliability 5. Self Adapting Frequency tools hardening induction quenching machine Heat Treatment like annealing, normalizing, ... quenching, tempering.1. Hardware and tools, such as plier, wrench, hammer, ax, screwing tools and shear (orchard shear).2. Automobile ... aluminum wheel, valve, rock arm shaft, semi drive shaft, small shaft and fork.3. Electric tools, such as gear and ...