【High Efficiency】This spot welding pen comes standard with a pair of Japanese concentric ball needles, which is efficient.【Applicable to long working hours】 Spot welder pen with 18650 battery, suitable for long-term work, improve work efficiency, made of thick brass bar.【Retractable】The handle of this spot welding pen has double springs to expand and contract, both of which can be expanded and contracted independently with moderate force control.【Beautiful and fast heat dissipation】The appearance is beautiful and clean, and the heat dissipation is fast.It is suitable for assembling batteries.All brass bars are cleaned and protected by strong acid to ensure the shine of the brass bars.【Industrial Spot Welding】This spot welding pen is suitable for industrial spot welding, practical, durable and strong.Number of pieces delivered: 1 Black color