The design with three T-slots provides maximum flexibility and allows for the mounting of a wide range of accessories that can be used individually or together. In the upper T-slot, you can quickly attach accessories like the Thule Load Stop 314, the Thule Folding Ladder Holder 311, or the Thule Ladder Holder 330 in seconds. You simply slide it in and lock it in place. In the rear T-slot, you can quickly switch between accessories like the Thule Roller, the folding Thule Load Stop, and the Thule Tie Down Eye, or even mount them all at once. The top of the Thule ProBar remains free for your load. Tested and approved for a maximum load of 50 kg per rail, allowing a total weight of 200 kg when four rails are mounted. With the Thule Fit Guide, you can find the right roof rack for your vehicle.