The E-Image Portable Camera Dolly with Tracks is ready to go out of the box for use with virtually all professional tripods. It supports up to 110 lb, and the track can be set up at lengths from 3.3 to 16.4'. High-density foam pads go underneath the aluminum rails to allow for safe and smooth operation. The system can be set up nearly anywhere, and it breaks down easily and packs away in the case for convenient transport and storage.