Bought these legs to pair with the Rhino Rack Vortex Aero Cross Bars on our 2013 Toyota Highlander Hybrid (with factory rails) and they are both great products! I like that the Rhino Rack legs and cross bars provide slightly more height above the roof of the Highlander (3.75 inches from top of roof to top of cross bars). We also purchased the Toyota factory cross bars but they are low profile (approximately 1.5 inches from top of roof to top of cross bars). We needed the extra height so that the factory clamps on our Thule Atlantis 1600 cargo box would not rub/scratch the top of the vehicle. This may not be an issue for other vehicles, but have noticed that factory rails on many new cars are very low profile and wanted to mention this benefit in case it helps someone else save the trouble of trying similar factory cross bars.Also like that the Rhino Rack system has a higher weight rating than the Toyota factory cross bars!