This is a finger hook for the 3rd slide of instruments like trumpets. Please note that it is silver. Non-brand. The shape is almost the same as that of a YAMAHA trumpet (photo 2). It worked perfectly on at least a YTR-2321. The screws are also included, but the screw diameter is different from YAMAHA's, so I don't think you can attach them. To offer it at a low price, I will send it by regular mail, so there is no compensation. Please understand this before purchasing. Thank you for your consideration. [Attention] I will refuse to sell to those who cannot rate immediately after receiving the item. In some cases, I will respond with a rating. However, this does not apply if you have explained the situation in advance. Thank you.