A bottle of repairable pointed welding head around 50 times blunt type such as horseshoe/knife type can also be used at least 30 times. Remove the black layer welding mouth. And butt welding mouth tin plating welding nozzle regeneration; For advanced electric welding machine to weld quality this product can make all kinds of welding head raised; Electric soldering iron head can't use how long will be oxidized oxidation after the welding head is not easy to welding components but can only be replaced; Through science and technology research developed economy and is simple easy to make your welding head for a new life; Win the time and improve the efficiency.