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 , can support long time use, stable and reliable, wear resistant and effort saving.Suitable for 18650 battery spot welding machine.Specifications:Name: Spot Welding PenItem size: 155 x 45 x 25mm / 6.10 x 1.77 x 0.98inItem weight: 250g / 8.82ounceMaterial:Aluminum copper alloycolour:BlackPackage Contents:1 x Handheld Spot Welding PenOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.