The seat covers came with plastic s-shaped hooks that were, I assume, to be attached to something to tether the covers. There were NO installation instructions with the covers and when I contacted the company to receive assistance with installation, I was told I would receive a hard copy, if not by e-mail, within two days. That was over 10 days ago...still no instructions. The covers fit over the seats ok, but are not secured to anything and shift around. Without instructions to secure the covers, I would not recommend purchase.