Ideal when walking two dogs that pull or dart off. Made with sturdy bungee material, the coupler absorbs the shock of the pulling dog and reduces the strain on the owner's shoulders and arms and on the dog's neck and throat. Couplers are a must-have for pet owners with two dogs. While walking two dogs used to mean leads, dogs, and owners got tangled, a coupler means just one lead is needed and the dogs are kept together. The length of each of the cords, including the trigger hook, is approximately 37cm. The maximum recommended weight for this coupler is 2 x 50kg.