Convenient and Effective---This sharp nail button makes a very small hole in cattle ear, which heals quickly to reduce their pain. Signature size for livestock or animals, such as cattle, pigs, sheep, goats, deer, dogs, etc. Easy to identify - Numbers on tag are eye-catching and easy to fade, making it easier to manage animal and livestock information. No harm to animals - Made of TPC material, combines strength, heat and chemical resistance, resistance and durability. Brass ear stud, never rust and corrosion resistance well. Wide Application---Each item has a unique number, which is convenient and practical to use. Application in the whole field of animal and livestock information management, such as breeding population, epidemic prevention or control, meat quarantine, etc.