Our Brumleve U-Clamp Kits are designed to keep your tarp securely fastened to the Roll Tube on your roll tarp system. Compatible with all roll tarp systems that use a 2-inch diameter roll tube. Self drilling screws included for installation. Available in packs of 10, 20, or 100. INSTALLATION INSTRUCTIONS: 1. Insert the roll pipe through the pocket on your tarp. 2. Place a u-clamp on the webbing strap sewed to the outside of the tarp pocket. 3. Screw the u-clamp to roll tube using the included self-drilling screw.