【Versatile Dog Collar Extension】: These black stainless steel links are great for extending the length of your dog's collar, ensuring a comfortable fit for dogs of all ages 【Sturdy Metal Construction】: Made from quality metal, these links are designed to withstand daily wear and tear, providing a reliable solution for adjusting your dog's collar without needing to replace the entire no pull collar 【Compact Size】: Each Links measures 3mm in diameter, making them lightweight yet sturdy enough to maintain the integrity of your dog's collar while adding minimal weight 【Convenient Packaging】: The set includes three chain links, offering you flexibility in adjusting multiple collars or having spares on hand for future use 【Easy Installation】: Simply attach these extra chain links to your existing dog collar to achieve the desired length effortlessly, ensuring a secure and comfortable fit for your pet at all times Size Chart: diameter 3mm/0.12inch length5cm/1.97inch Package Includes: 3x Dog Collar Extra Prong Links Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.