Enhance your dog's training experience with the Starmark Pro-Training Add-A-Link Collar Extension. Specifically designed for large-sized dogs, this regular-sized, adjustable collar extension is a versatile addition to your pet's collar, allowing for a custom fit and added functionality. Featuring a sleek and durable design, the Starmark Add-A-Link Collar Extension is easy to attach and adjust, making it an essential tool for any dog owner. The package comes complete with three links, ensuring a long-lasting and reliable solution for your canine companion's training needs.