The Rhino-Rack Load Holder is designed so that you can secure your load in position so it doesn't slide in transit possibly damaging other items you have mounted to your roof racks.
Sold as a pair, they stand 125mm in height and fit onto the Rhino-Rack Heavy Duty Roof Racks. It's a great little accessory that is recommended for use if carrying multiple elongated items. Perfect for the busy Elevation. If using a Rhino-Rack Vortex bar then you will require an S602 (Vortex load holder).