The CURT roof rack cargo carrier is a roomy and versatile cargo carrier with a lightweight design and easy installation. It features a simple two piece assembly and mounts to most styles of roof rack crossbars. With its strong steel construction and durable E coat and black powder coat finish, it easily stands up to the tough trails and long miles ahead. One of the key advantages to the CURT roof rack carrier is its extension option. With the extension piece installed, this cargo rack goes from a little over ten square feet of storage room to an impressive 16 Square Feet, providing a lot of extra room for storing bulkier items. The roof rack cargo carrier readily accepts a CURT cargo bag or cargo net to get you packed up and on your way with less hassle.