Worked great for my application. Used to mount it to a 1-1/2" square rail to support camera recording equipment for testing. I bought a "Sioti" ball mount to mount the camera. The first one worked fine so bought one I used a different clamp for the second installation. The clamp has rubberized feet for a better grip and has a groove on one side for easier handling of round pipes. The large handle was good to get a really firm grip on. The device on which when I fastened it vibrated a lot and the clamp stayed tight the whole time.