The Double-Dog Coupler? utilizes your existing leash and allows you to walk 2 dogs at once! You have the option of walking two dogs close together, two dogs far apart, and dogs of different sizes. This product allows owners both safer, closer control on crowded streets and a more free and wider range during park walks! The Double-Dog Coupler? straps are made of quality nylon webbing. All parts are made of durable custom nickel-plated steel for reliable strength and reduced weathering. The coupler features the patented Sporn Adjusti-Buckle.