Stabilize the Backdrop Support System: Professional aluminum alloy construction for durability and stability, making it strong for heavy-duty work. Adjustable from 2.4 ft (75 cm) to 8.5 ft (260 cm). Never Slipping Backdrops: 4 Spring clamps can hold the muslin, canvas, paper, and etc, keep it fixed on the background stand, never slip! Even use the clamps for a long time, they will not break down. 2 x Crossbar: The crossbars can be used alone or in combination. A single crossbar can hold the collapsible disc lighting reflector, 2-in-1 collapsible background panel, etc. Easy to assemble and disassemble: it doesn't take up a lot of room to store or to transport.