Sovella 831654-35 R47 Perfo-Stor Steel Tool Perforated Panel Hook, 8 lbs Capacity, 4.72" Diameter x 13.77" Width, For Tool Storage System Panel by Sovella. $13.09. Sovella R47 tool hook for tool storage system panel. Made of steel. Hook for the efficient storage and organization of tools. Hooks can be easily attached to our perforated panels. Measures 4.72-inches diameter by 13.77-inches width.