There are 4 holes on the back of the plastic bag organizer (Installation screws are provided in the package). You can easily put kitchen storage bags box on the counter, drawer, cabinet, also can be mounted on the wall. SIZE: This storage organizer measures 12" x 12" x3". This organizer contains 4 pieces of food bag organizers. There are 4 holes on the back of the plastic bag organizer (Installation screws are provided in the package). You can easily put kitchen storage bags box on the counter, drawer, cabinet, also can be mounted on the wall.Our products are made of premium acrylic material. This high-quality acrylic transparent materials are easy to clean, odorless, and more durable. The clear acrylic design gives you an optimal view of their contents so that you can easily see when supplies are running low.