The retractable design makes the crossbar more flexible in use. Users can adjust to the appropriate width (5.3ft/1.58m - 10ft/3m) as required to adapt to different sizes of background backdrop. For a good decorative effect, it is best not to hang objects over 10lbs. With adjustable height (2.6ft/0.8m - 7.0ft/2.1m) , the aluminum alloy backdrop stand is durable, and the design of the tripod base ensures it wont shake when fully extended to its maximum size. The clamp made of strong and rugged type of plastic, matches with clips enable to clamp anything onto the stand tightly and present a better shooting effect. And sandbags can make the back drop stand more stable after loading heavy objects. (Fill sandbags with sand, rocks, soil, etc... To improve the stability of the backdrop stand.)