Affectionately known as the “Burger”, its claim to fame is that it offers the travel of a 4’ slider in a compact 29” frame and due to its I beam construction, when used with a solid base, like a full size dolly in standard mode, it does not need supports. No supports means ultimate freedom with your shot! It also possesses the unique ability to tuck away out of the frame as you move the camera, again, more freedom with your shots!