The 2-Pack Portable Frame Clamps from Webcoat are specially designed to fix the body of park furniture such as picnic table or bench portable frames to a solid surface such as asphalt or concrete. Use the clamps with your own hardware, as there are multiple possibilities of installation, thus, different hardware required for asphalt or concrete. The Portable Frame Clamps will help secure your park equipment from theft and misuse. Two bolts secure each clamp to the surface. The clamps are solid steel straps that are designed to tightly fix your portable park equipment to the ground. Request the 2-Pack Portable Frame Clamps for your tables and benches to protect your investment.