Durable Material: The tarp clamps are made of PA, have a specific thickness, are sturdy and durable, not easy to break, and can be used for a long time. Great Grip: This heavy-duty tarp clamp is designed with a thumb screw to tighten the jaw and hold the tarp securely even in heavy storms. Tarp Clamp Size: It is 8.1 cm long and 2.5 cm wide. The jaw opens approximately 2.8 cm and the hole diameter is 1 cm. Easy to Use: Easy to install and remove, just tighten or loosen the screw knob. The teeth inside grip the tarp firmly, but won't tear or damage it. Widely Use: The tent clamps are perfect for fastening tarps, awnings, rain covers, car/truck covers, bike covers, boat covers, pool covers, sun covers, temporary projector screens, sofa covers, BBQ covers, makeshift rain covers for your hammock, etc.