This is a kind of fine quality spot welding pen, adopt thick copper bar, help enhance the working efficiency, and suitable for long service time. Integrated design, beautiful and neat, with fine heat radiation effect. There are dual springs on the handle, each welding pen can expand and contract independently. Built-in limit switch, one hand operation, do not need foot pedal. You can have a try. Features: Adopt thick copper bar, help enhance the working efficiency, and suitable for long service time. Integrated design, beautiful and neat, with fine heat radiation effect. There are dual springs on the handle, each welding pen can expand and contract independently. Built-in limit switch, one hand operation, do not need foot pedal. With comfortable hand feelings, can support long time use, stable and reliable, wear resistant and effort saving. Suitable for 18650 battery spot welding machine. Specifications: Name: Spot Welding Pen Color: white, blue, green, black (optional) Welding needle size: 50 * 3 * 3mm / 1.97 * 0.12* 0.12in Item size: 155 * 45 * 25mm / 6.10 * 1.77 * 0.98in Item weight: 250g / 8.82ounce Package size: 200 * 100 * 50mm / 7.87 * 3.94 * 1.97in Package weight: 300g / 10.58ounce Packing List: 1 * Spot Welding Pen Shipping: 1.We guarantee to ship goods out within 24-72 hour after payment confirmation except holiday. 2.We ship by China post,HKpost EMS,DHL,Fedex,according to your choice when placing orders . 3.If you didn't receive the item after 45 days,please feel free to contact us.We will make all our effort to resolve the problem. Warranty: 1.All items have 1 year guarantee.IF your purchase do not meet merchantable quality, fitness for purpose or match the description, We can make sure your issues are resolved . 2.For wrongly-shipped items, Please contact us in 48 hours after delivery.We will arrange to deliver the correct items or return all your payment. 3.For defective or faulty products,please take photos or videos,we would resend or refund after confirmation.