Thank you for viewing. This is a saxophone screw made by Shiba Screw, a universal model for Yamaha saxophones. It has been adjusted in person. It feels like the instrument will improve. It is carefully crafted with attention to detail, and is an item that is not only for appearance but also practical. Please check the images for details of the product. If you have any questions, please feel free to contact us. *Please note that we do not accept returns or exchanges. Thank you for your consideration.