[Non-slip Tarpaulin Clamps]--- Screw-down type tent fasteners are designed with adjustable spiral thumb screws to tighten the jaw to provide strong gripping power on your tarp. Perfect for securing a sun sail, -up , or tarp. [Powerful Loading Force ]- Increase the load capacity up to 33 lbs by linking each corner of the tarp or tent by providing a secure and stable structure even during the harshest winds. [Special Mouth Design] --- This awning clip has a toothed design that makes the teeth more stable. And the opening of our lock grip clamps can be adjusted up to 0.25 inches, large enough to fit universal tarps. [Widly Use ]-The tent clamps heavy duty provide constant firm tension that is excellent for fastening tarps, increasing structure integrity stability. It's perfect for tent, tarp, canopy, garage roof, screen, shelter, boat cover, etc. The tarp clips are made of PA material, not easy to break. The size of the clip is 8cm long, 3cm wide, and 2.5cm high, and the length of each strap is 13CM Colour:Black Material:plastic + elastic cord Size: clip:8x3x2.5cm strap:13CM Package Contents: 12 * tent clips 12 * straps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.