Size and Packing: The dimensions of these plastic tarp clips are 3-1/5 x 1 inch (81 x 25mm), the diameter of the hole is 1/2 inch (13mm), the jaws can be opened about 1/4 inch(64mm). The Packing includes 36pcs tarp clamps. Durable Material: Our black tarp clamps with holes are made of high quality PE. They are waterproof, corrosion resistant, strong and durable. It can be reused for outdoors in a long period of time. Super Holding Power: Our pool tarp clips are designed with wing bolt to tighten the jaws, at the same time you can remove the bolt and put it through the eyelet. The jaws are designed with a unique toothed alligator beak that holds the tarp firmly in place. It will not cause damage to tarps even during the strong storms Easy to Use: These tarp clips heavy duty lock grips are very easy to install and remove, you just need to tighten or loosen the thumb screw according to the thickness of the tarp cloth while use it by providing a instant anchor point to attach any standard bungee cord or rope. Wide Usage: Our tent clip clamps are perfect for securing tarps, canvas, car and truck covers, swimming pool covers, awning, umbrellas, sunshades, bike covers, boat covers, projector screens, sofa covers, barbecue covers, temporary shelters or any fabric covers that require extra support.