Diy Spot Welder Machine Welding 18650 Battery Handheld Spot Welding Pen Automatic Trigger Built-in Switch Blue 3.2 inches LM7912: This is a negative

LM7912: This is a negative voltage regulator integrated circuit (IC)

7”W X 16

High-Quality Construction: Built to last with durable materials

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Physical Characteristics

Diy Spot Welder Machine Welding 18650 Battery Handheld Spot Welding Pen Automatic Trigger Built-in Switch Blue 3.2 inches LM7912: This is a negativeThis product is an integrated spot welding pen that needs to be used with a spot welding machine. It is just a spot welding pen and cannot be used alone. The 18650 battery spot welding pen is suitable for long term work and improves work efficiency. It is made of thickened copper strips. The appearance is beautiful and tidy, the overall copper bar, heat dissipation is very fast, very suitable for assembling battery packs, all copper bars are cleaned