Ring section is designed to securely hold catalogs and other reference materials for placement in catalog racks. Use with punched magazines, catalogs and single sheets. Ring section slides easily into any Master Products catalog racks with unique tongue and groove system. Load on either side of the split ring. One-piece design permits faster sheet changes. Ring section provides greater visibility of contents and has greater efficiency. Design offers 4-1/4" center to center, 7/32" diameter rings for 1/4" holes or larger, and heavy-gauge steel construction with a durable powder-coat finish.