Description: Gear Position Adjustment:Spot welder has 199 gears for adjustment. Use the rotary encode machine to adjust the gear position. The number is flashing. Click the encode machine to confirm that the display is always on and you can weld. Press and hold the encode machine for 3 seconds to turn it on or off. Special Spot Welding Machine Refills: The pen refills tailored for small spot welding machines are all made by precision lathe processing, and the welding is more firm. Applicable: Welding circuit board supports 32650 26650 18650 18500 17490 14650 electric welding batteries, all of which can be welded firmly. Applicable: Relay spot welder supports 0.1mm, 0.12mm, 0.15mm, 0.2mm, and various thicknesses of metal sheets can be welded. Material: The welding tool is made of PCB material, which is durable and can be used for a long time. Size Chart: 15cmx10cmx6cm/5.91inchx3.94inchx2.36inch Package Includes: 1 Relay Spot Welder Note: Please allow slightly errors due to manual measurement and different monitors.