This is a set of two THULE ProRide 591 bike carriers. They were sold as genuine BMW accessories, but the contents are the same. I used them with square bars. There is a set of parts that appear to be for WingBars, so I will include them (as a service, and I do not guarantee installation). Everything in the photos is included. Please note that there is only one key. As shown in the photos, one of them is missing the black part at the back. Also, of the four straps, one has been cut and repaired with tape, and two have the finger-grip ends cut off. Only one is in good condition. I have used them all without any problems, but if you are concerned, please purchase aftermarket parts separately. Thule ProRide 591