When I did the window felts for a customer about 20 years ago, I ordered the felts from Bratton's. You could order the felts with the riveted end clips installed, or order them a bit cheaper and rivet the clips your self. I ordered the riveted ones for the customer, and the do it yourself ones for my car, thinking they would be identical. They weren't, and the ones with the riveted ends were better, and worth paying the extra two or three dollars to buy.