TIG welded Durable powder coat finish Fully adjustable to set camber and toe Heat treated 5/8" heim joints rated to 17,900 lbs 1.25" Dom tubing with .125" thickness 416 stainless steel misalignment spacers HD versions are constructed from massive 1-1/2" seamless dom tubing you will never have to worry about bending or breaking another radium arm again. RADIUS RODS UPPER X3