Stable Instant Anchor: We use an alligator mouth for the clips to create an instant anchor point for attaching any standard rope without having to drill holes in the tarp or cover. Easy to Use: The unique slide lock design makes it easy to tighten and loosen on thick or thin tarps. Unique Design: The toothed crocodile mouth design makes the teeth more stable. Even if it is a strong storm, it is safer to prevent the tarp from falling. Wide Use: The tarp clips are ideal for outdoor camping tents, awnings, caravans, tarps, canvas, canopies, boat covers, pool covers and more.