These rings are hot drop-forged in one piece - not just bent and welded. Drop-forging is a superior process resulting in increased structural integrity of the metal, and higher real-world strength ratings.
Each part is polished, then the finish is passivated to create durable surface which is highly resistant to corrosion.
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.
www.P65Warnings.ca.gov