Couplers allow 3 dogs to be walked together more efficiently on one lead. Made of durable nylon with heavy-duty, nickel-plated swivel snaps. A great choice for dog walkers, doggie daycare owners, or any dog owner with multiple pets. This makes your walk so much more enjoyable!! Stop by my store for more fun things for your dog!! I also carry many styles of No Choke and No Pull Harnesses, Toys, Charms and more!!! Puppia, Bark Appeal, Doggie Design & EzyDog!! I love what I do and want this to be a fabulous transaction for you and your pup!!! Don''t forget to bundle to save on postage!! And get 20% off 3 or more items!!! Happy to look at all offers!!! Happy Poshing!!!