4 Packs 7x10ft Backdrop Stand Kits include 4 whole stand systems, which is professional for live stream, video shooting, wedding, etc Press the crossbar spring and click on the other end to insert it, twist the knob on tripod stand to lock Each backdrop stand with 4 section crossbars and 2 adjustable tripods to meet your needs Aluminum Alloy Construction with 11 Lbs weight capacity for sturdy & durability Detachable crossbars & foldable tripods can be packed in carrying bag for transportation