They looked really good and I was very excited but did notice that they unscrewed the top and bottom (only one had this) every time I drove and I did had to screw them back in every time I stopped and in the past both 'caps' actually came off while driving and I took them completely off and checked and it was completely pulled off both ends. Not to mention that I don't recommend buying checks unless you're wasting your money and time. How do I contact someone for a refund or replacement?