Adopting the production of stainless steel and copper alloy. It has aging quality resistance, wear-resisting quality, anti-impact ability. The smooth swivel has a big tensile strength. Even though in some situations that some strong force is pulling it, it can also rotate smoothly. For the connection, there is stainless steel argon arc welding for soldering which is very solid. The special technique for cosmetic makes it very plain and smooth and also less likely to harm the fishing line.