Designed to mount the Tether Table Aero on the same solid support as your camera, the Tether Tools Rock Solid 4 Head Tripod Cross Bar lets you build a custom, ideal workstation to meet your specific needs. It has 3/8-inch screws on each end that can be paired with the Rock Solid Cross Bar Side Arm to form a T-shaped tether setup. For added versatility, you can use the 3/8-inch screws and the knurled plates for quickly and easily mounting other accessories as well. For safe and convenient storage, you can place the cross bar in the custom designed travel case provided.