"Rolled steel" refers to a type of metal that has been processed by being heated and then passed through a series of rollers to give it a specific shape or thickness. Full definition
The front cradle is now also aluminum in place of rolled steel to trim 36 pounds. (autoweek.com)
This unit is made of cold rolled steel, ensuring its durability and strength for years. (geekwrapped.com)
But the bar — which is built with rolling steel weights inside — provides unique stability benefits that you don't get from other equipment. (verywellfit.com)