Deck panels are kept from shifting by the the same frame runners that are used for carrying the frame. In the vast majority of cases, panels need no extra fiddling to hold them in place. Wind is not going to blow them off, for instance. But for those special situations where waves might be expected to rise up and push on the panels, like: very large lakes, some rivers, tidal waters, or large-watercraft traffic areas, we offer panel clips to positively anchor the panels to the frame. The four clips per panel keep with the spirit of the rest of our product line. They’re easy…and they’re cheap insurance.