The Photek Background Support System comes with a sectional 12' crossbar. This is a Photek 3' (91cm) aluminum extension section only, for extending the width of that crossbar, or replacing an existing section.
To ensure stability, an additional stand or support for the middle of the crossbar should be used. In addition, sandbags are suggested for the stands.
This extension goes in the center of the crossbars. You utilize the normal ends of the crossbar system to mount to stands. You do not need to drill anything as another review incorrectly states.
I bought these to extend the Impact brand support system since they didn't offer the extension in that brand. It's a little tight when combining the two brands together so I had to use some WD40 to make it easier.
