the adjustable tension shade includes a spring motor , an axle , and a shade roller . the spring motor is mounted to the axle and drives the shade roller . the axle has an adjustable telescoping shaft and the free ends of the axle are spring - biased outwardly away from each other . the shade roller has a tubular body that surrounds the axle and the spring motor and serves as a mounting point and storage unit for a shade . a pair of feet is connected to each end of the axle and each has a soft rubber gripping surface thereon .