PREVENT EQUIPMENT MOVEMENT: Keeps rackmount equipment secure on sliding shelves DURABLE CONSTRUCTION: Made from heavy-duty cold rolled steel for long-lasting stability FRONT AND REAR SECURITY: Sold in pairs to secure both the front and rear of your equipment IDEAL FOR TALL EQUIPMENT: Perfect for securing printers, storage devices, and more COMPATIBLE WITH 115 SHELVES: Designed specifically for use with RackSolutions 115 Sliding Equipment Shelves