Latest Soldering Iron KitsFEATURES NEW DESIGN: The design of the side can always observe the internal operation, quick and easy to replace the heating core. INTEGRATED POWER SWITCH: More energy efficient and safe in operation and use, no need to unplug frequently each time. SELF RESETTING RATCHET TRIGGER BUCKLE: This trigger buckle has a self resetting function and a good sense of ratchet progression. SAFETY DESIGN: The use of anti bending tail wire, to prevent the use the