Cords Free Tear Down Light Filtering Window Shade is a customizable, light filtering roller shade perfect for any window in the home or office. Made of soft, easy-care, micro-ridged vinyl that will cleanly Tear Down to the desired width. Its telescopic roller has a cardboard insert underneath the vinyl fabric that is perforated at every half inch. The Shade's plastic handrail is also scored at half inch increments to snap down to the new width of the shade without any additional tools. To operate the Cords Free Tear Down Light Filtering Window Shade simply raise or lower the handrail. Size 37 will fit windows from 22 inches to 37 1/4 inches; size 55 will fit windows from 37 inches to 55 1/4 inches; and size 73 will fit windows from 55 inches to 73 1/4 inches. Brackets accommodate inside or outside mounting and detailed instructions are included. Tools needed: Screwdriver and scissors.