With integrated design and fine heat radiation effect, this fine quality spot welding pen adopts thick copper bar to effectively enhance working efficiency and work for long time. With the built-in limit switch, you can operate in one hand and foot pedal is not required. Why not have a try Features: Adopts thick copper bar to effectively enhance working efficiency and work for long time. Integrated design and fine workmanship ensure great heat radiation effect and stable performance. Dual spring on the handle, so that each welding pen can expand and contract independently. With built-in limit switch, support one hand operation, do not need foot pedal. With comfortable grip, it supports long time use without fatigue, reliable and effort-saving. Suitable for 18650 battery spot welding machine. Specifications: Material: plastic Color: Black or Blue or Green or White (Optional) Package Size: Approx. 200x110x40mm or 7.87x4.33x1.57in Package Weight: Approx. 230g or 8.11oz Note: Please connect a spot welding machine to use. Packing List: 1 x Spot Welding Pen