Rock of Ages has been manufacturing our patented Accu-Tensioned (Trademark) granite press rolls for over twenty years. Although most press rolls from other manufacturers are currently made from synthetic materials the performance and safety record of our Accu-Tensioned Granite rolls is one of the best in the industry, regardless of the roll material. In addition, our rolls offer substantial price advantages over the synthetic rolls and a 1 year limited warranty on materials, design and workmanship. Contact Don Murray for a discussion of your application and a quote.