This is a spiral saddle type adopted from the late 1958s. Spiral saddles produce a slightly crisper sound than brass saddles. In terms of sound quality, it is recommended for Teles equipped with high-output single-coil or humbucker pickups. Also, it is a saddle that prevents string slippage and misalignment better than brass saddles. With aging processing using corrosive liquid, corrosion progresses faster than usual, and the set screws may become difficult to turn quickly, but since the rust appearance is dye, you can use it for a long time just like new. It can be installed on standard Fender specifications. Screws are not included. Aged brass saddle bridges are also listed separately. The aging can be made more or less intense than in the photos.