Made of high-strength nylon material, which is waterproof, weather-resistant, tear-resistant, lightweight and durable. Bolted fastening for superior bite force, connection and heavy duty. The unique toothed crocodile mouth design makes the teeth more stable. Designed with adjustable helical thumbscrews, fit the heavy duty tarp. Easy to install or remove, just tighten or loosen the screw knob to adjust on thick or thin tarps. Elastic bungee cord is suitable for fixing household items, fixed car supplies, canopies, tarpaulins, sunshades, sleeping bags and other items that need to be bundled. Perfect for holding up tarp, canopy, car/truck cover, bike cover, boat cover, pool cover, sun shade, temporary projector screen, make-shift rain fly for your hammock, etc. Specification: Material: Nylon, Metal Size: Clip(LxWxH): approx. 8x3x2.5cm/3.1x1.2x1inch Bungee Cord(length): 13cm/5.1inch Package Includes: 1 Set Tarp Clips