Takumi Screws, made by Morino Gakki in Sendai. F-type, compatible with screw pitches of brands like Buffet Crampon, Selmer, Bay, and Bonade. Through a special "Takumi processing" applied to the metal, unevenness in sound is eliminated, and performance is improved. Replacing the ligature screws with these does indeed reduce sound unevenness, especially increasing power in the lower register and preventing thinness in the higher register. The new price is 6,600 yen (tax included) per screw, so this is half price! Thank you!