This shuttle head boasts high wear resistance, ensuring good stability during high speed process Crafted from stainless steel, good durability, not easy to break, long service life This rotary shuttle head replacement is engineered to improve fabric sewing processes in sewing factories and workshops Very suitable for sewing factory technicians who demand components to develop their maintenance and operating productivity Improve your sewing efficiency with this Rotary Shuttle Head, designed to fit various high speed sewing machines