Features: Made of premium metal material, has high performance and long service life. Adopts thick copper bar, helps improve the Work efficiency. Integrated design, neat look with fine heat radiation effect. With double springs on the handle, each welding pen can expand and contract independently. Built-in limit switch, one-handed operation, no need for foot pedal. Comfortable hand feeling, support long time use, stable and reliable, wear-resistant and effort-saving. > Suitable for assembling batteries. Features: Material: Metal Optional Colors: White, Blue, Cyan, Black(Optional) Item Size: 155 * 45 * 25mm / 6.1 * 1.77 * 0.98in Package size: 200*140*40mm/7.87*5.51*1.57in Package weight?: 260g/9.17oz Note: Due to the different display screen and light effect, the actual color of the item may vary may be slightly different from the color shown in the pictures.