With the duo dog leash you can easily guide both dogs with one hand, without the two lines getting tangled up. With the two stoppers you can control both lines independently of each other - and effortlessly. Since the two buttons correspond in color to the respective leash, you always know exactly which button you need to press. Walks will be so much more relaxed. Not only for you, but also for your two furry friends. The swivel joint prevents the lines from crossing each other as it constantly moves and re-aligns itself.