This is a finger hook for the 3rd slide of instruments like trumpets. Please note that it is silver. Non-brand product. The shape is almost the same as the one for YAMAHA trumpets (photo 2). It worked perfectly on my YTR-2321 at least. The screws are included, but the thread diameter is different from YAMAHA's, so I don't think you'll be able to use them. To offer it at a low price, I will send it by regular mail, so there is no compensation. Please understand. Thank you for your consideration. 【Attention】 I will not accept purchases from 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.