In developing the modular sections of our new expedition style trailer we had to come up with a weldable clamp. We have just finished all the field testing to our satification, and completed the patent pending process.We are now making these clamps available for retail sales as well as for our own use. The clamp portion goes on tube diameters from 1.25" dia. to 2.25" . The weldable saddle accepts tube 1.25" to 2.25" and a flat surface for square, rectangle, and flat bar welding. We've used them on removable roof racks, Light bars, fire ext. brackets, ect. Check em out @ www.bengelsoff-road.com