DOCO Signature Coupler features of perfect combination of PERFORMANCE and STRENGTH. Leash is designed for people and dogs that love to enjoy the outdoor active lifestyle. Chrome polished, zinc alloy durable metal 360° swivel hook is comfortable to snap on any dog collar or harness. Solid and vibrant colors are easy to see. You can adjust both side with tri-glide to fit your dogs' walking behavior or their size. Improve your walking enjoyment and safety when walking more than one dog. Instead of feeling like a maypole, your dogs will learn to work together to move forward instead of getting distracted and pulling you every which way but ahead.