Ruff Tough Dog Kennel Coupler Kit comes with two brackets and two straps enabling you to join two or more kennels together. Placing the bracket on the top between two kennels, secure with 3/4 x 1/2 inch bolt and flat washer and bolt down to molded in inserts. The strap goes on the bottom between the two kennels and is secured with 9/16 inch wrench. Secure both front and back.