Side Adjust Tandem Rollers feature radial ball bearings that are manufactured by Truth Hardware to provide the highest quality assemblies. Machined from high-quality solid steel, Truth’s bearing raceways are heat-treated and plated for wear and corrosion resistance. This method produces long-lasting true running rollers capable of carrying the heaviest loads. Wheels are offered in various diameters with a choice of steel, stainless steel or nylon rolling surfaces.