These universal clamp mounts will work on any 1.75in round tubing and are adjustable to fit any Hi-lift type Off-Road Jack. Jack Clamps are mounted with two stainless Allen head screws that clamp to your 1.75in metal tubes on your truck, buggy or what ever you wheel. We use a 1/2in mounting stud on all mounts and .50in wing nut holds your jack in place.