Convert twin beds to an almost king beds safely and easily, eliminate wiggling, and the possibility of mattresses moving apart during sleep. Great for guests you can easily convert two singles to a king. . and back, without hassle of high costs. 236" x 2” allows you to wrap the strap around the two twin mattresses, and secure them perfectly together, and without any trouble. Place the twin beds together and wrap strap around the outer edges of mattresses and pull it tight. We recommend placement of the buckle where you won't hit the buckle with your knee such as on the headboard side.