This tension rod is versatile enough to adapt to a wide array of sizes of showers. Easy locking tension poles provide a no-tools solution for quick and easy installation. New patented technology allows you to pull to the correct size to create uniform tension. Eliminates wall-walking and endless twisting. Coated, non-slip foot will not scratch or mar surface. Corrosion and rust resistant for longevity. Simply pull tension rod to size of opening, extend pole an additional inch, twist 5-10 times until pole tightens, compress pole and place in opening. Small size expands from 130cm - 220cm .