Works with the TBMK020. Add extra lateral support for your tent to avoid unwanted flexing of the hard shell. Use these when the edges of a hard shell tent mounted with the TBMK020 are not supported by the side profiles of a Front Runner Roof Rack. Fits popular brands such as Auto Home and James Baroud. Easily secures to the underside of your tent using the mounting channels. No drilling or modification of your tent is required. PLEASE NOTE: Warranties on some tents may be voided if the tent does not have sufficient support.