Feature:1. [High Efficiency] Spot welding pen uses thick copper platoon, which is beneficial to improve work efficiency and is suitable for long term use.2. [Good Heat Dissipation] Integrated design, exquisite workmanship, beautiful and clean, and good heat dissipation effect, to meet your various need.3. [With Double Springs] There are double springs on the handle, and each soldering pen can be expanded and contracted independently.4. [Labor Saving] This spot welding pen is feel comfortable, which is durable, stable and reliable, wear resistant and labor saving, so you can use it with confidence.5. [Simple To Use] Integrated limit switch, and can be one handed operation, no pedal required, suitable for 18650 battery spot welding machine.Specification:Item Type: Spot Welding PenSoldering Pin Size: Approx. 50 x 3 x 3 mm / 2 x 0.1 x 0.1 inProduct Size: Approx. 150 x 40 x 15 mm / 5.9 x 1.6 x 0.6 inMaterial: Metal iron, copperWeight: Approx. 259g / 9.1oz Package List:1 x Spot Welding Pen2 x Spring2 x Terminal1 x Hex Wrench1 x ManualNote:Please connect to an external 12V power supply