Fine Workmanship: Strong and durable, stain resistant, anti rust, heavy duty chain connection, strong enough for large dogs. Seamless Design: The seamless welding technology avoids the appearance of hair pinching and increases the strength of the product, which can withstand the pull of large dogs. Easy and Convenient: The anti pull is not easy to fall off, does not jam the throat, the length of the rope is operated by one button, and the use is more intimate. Materil: Made of high quality copper, wear resistance and corrosion resistance with a long service life. Comfortable and Durable: This dog collar made of high quality copper will never irritate the skin, and the smooth chain will keep your dog comfortable.