Durable Material: The tarpaulin clamps are made of PA material, have a certain thickness, are sturdy and durable, not easy to break and can be used for a long time. Super Grip: The heavyduty tarpaulin clamp is designed with a thumb screw to tighten the jaw and can securely hold the tarpaulin even in heavy storms. Tarp Clamp Size: Measures 8.1 cm long and 2.5 cm wide. The jaw opens about 2.8 cm, the hole diameter is 1 cm. Easy to Use: Easy to install or remove, just tighten or loosen the screw knob. The teeth inside hold the tarp firmly, but will not tear or damage it. Wide Use: The tent clamps are perfect for holding tarp, canopy, rain cover, cartruck cover, bike cover, boat cover, pool cover, sun cover, temporary projector screen, sofa cover, barbecue cover, makeshift rain cover for your hammock, etc.