This is curved dolly track for the Indie Singleman dolly (or other dollys compatible with PVC track). It totals 10 feet internal diameter (13 feet external) of PVC track with connectors and braces. This kit forms 1/4 of a 20 foot diameter circle, providing a 90 degree run around a centered object. Two kits can be combined to form a 180 degree half circle of track, or an S-shaped track.
The dolly is sent folded for shipping. To use the track with the Singleman dolly simply unfold the track, you do not have to unscrew anything. An example video can be found here