Crafted from CNC-machined 416R stainless steel for exceptional durability and corrosion resistance this thread protector is precision-engineered to fit 9mm Glock barrels with a 1/2"-28 thread pattern. Its black PVD finish adds a sleek protective layer ensuring long-lasting performance while maintaining a low-profile appearance. Built to withstand rigorous use it's an essential accessory to keep your threads safe.