This customized retractable leash is designed to make it easy to control both dogs with one hand! When the retractable leash is unlocked, both dogs have the ability to stop, move, and explore more independently than if they were attached to fixed length leashes. As you shorten the retractable leash, both dogs come together and are easy to control. Both leashes need not remain in a line—allowing each dog to roam, stop, and double back with minimal tangling.