【Yu-packet shipping】 is available. Delivery is also available on Saturdays, Sundays, and national holidays. Please purchase this if you are in a hurry. This is a static discharger. Compatible screw sizes are M8 and M10. It's a popular tune on sites like 【Minkara】. It is said that by discharging static electricity accumulated on the car body with this device, the car's original performance is brought out. Please use it by tightening it together with screws in the engine room, etc. It seems that the maximum effect is achieved by unraveling the flat braided copper wire when using it. #StaticDischarger #ElectronDischarger #StaticDischargeCable #Earthing #MufflerEarth