Homdox Plastic 4 Way Locking Lockable Pet Cat Door Small Cat Flap White (17 x 7.4 x 2.0inch) Designed to walk 2 dogs comfortably with a single lead, Comforable handle to carry. 2-way dog coupler is the easy way to walk 2 dogs on the same lead. The dog coupler is helpful for walking both of your dogs at the same time, and allows you to walk them using only one hand. Strong and durable structure of the dual dog leash for you to use, use one instead of two, convenient and save money. Total leash length 49.7'', retractable length: 19.5-31.2inch, to give dogs freedom move indenpently and enjoy themselves. This dog leash coupler is an absolute must have if you are lucky to have 2 high energy dogs that you walk at the same time by yourself, makes it easier to walk them without endangering your life.