Titanium ligature screws. Compatible with a wide range of ligatures, including those from Buffet Crampon, Selmer, Bonade, and L.R. & Benard (HB). (Not compatible with Momo or Wood Stone) I purchased these from a shop that is no longer in business, so they are difficult to obtain now. Titanium's resonance is attracting attention, and it's increasingly used for thumb rest screws and ligature plating. Replacing your ligature screws with these can make your breath support much smoother and improve the flexibility of the reed. The sound quality is also excellent. However, it won't change the fundamental sound of the ligature itself, which is a great feature. (This is just my personal opinion) I will send only two screws via Nekopos or similar shipping method.