This snap hanger are sold in a set of 2 rails, one at the top and one at the bottom of graphic. The top and bottom rails snap closed to hold the graphic securely in place. They can hold graphics of any length and can display graphics on both sides. The easy snap system makes changing graphics easy as no tools are required. These snap hangers are also known as banner hangers, poster hanging rails. They are ideal for advertising as well as general signage and can be used in a variety of indoor locations for a smart, professional look for your businesses signage.