Given the variety of neck joint conditions, the design prioritizes ease of tightening, and the spoon-like shape subtly affects the sound. Because the silver material is annealed, overtightening can strip the threads or twist the knob, so be careful not to overtighten. Due to the annealing (soft state), the sound and vibrations from daily practice gradually temper the annealed screw. Ultimately, like the instrument itself, the player's habits and technique determine the final finish of the annealed screw. The annealed screw is very soft and comfortable to play. The low notes resonate with a thick and rich tone. Similarly, a beautiful sound can be obtained in the mid and high ranges with the all-silver construction. Eventually, with a matured all-silver screw, responsiveness is added to the above. 950 silver is a material that does not age-harden and requires some vibration or processing to harden. 925 silver is a material that age-hardens and hardens over time even without any processing. Nagasawa Seisakusho: The maker himself has won awards in international competitions, and based on that experience, they repeatedly test and prototype, designing and manufacturing all-silver wind instrument boost items in their workshop in Hatoyama-machi, Hiki-gun, Saitama Prefecture. Surface finishes include solid silver, GP, PGP, and PtP. We manufacture a wide range of all-silver products. Please feel free to contact us. We have our own website. #NagasawaSeisakusho #NeckScrew #Selmer #Yanagisawa #Saxophone