Rixin trust 4-piece bars are built for abuse and are made with multi-butted chromoly that is post-weld heat-treated for superior strength. Tall 4-piece bars tend to fail where the uprights are welded to the clamp bar so Rixin added a gusset to prevent that. Features: Multi-butted 4130 cro-mo tubing. Post-weld heat-treatment. 9.25" rise. 30" wide. 12° backsweep. 1° upsweep. Gussets. Black or Chrome. About Butted Tubing The attached drawing shows how the butted tubing actually works. Thicker wall on the ends and on the bends where you need the strength and thinner wall on the straight parts where you can save weight. Typically 11 or 13 butted. About RixinA brainchild from the minds behind Merritt in New Jersey, with a stacked group of shredders on their roster, including New York native, Youtube staple, and all-around ripper Billy Perry, Tyler F and Dan Kruk.