The Trac-Grabber is a new revolutionary and inexpensive device which is quickly and easily strapped to the drive wheels of a vehicle which is stuck in the sand . mud . or snow . and enables the vehicle to get unstuck quickly under its own power. With the Trac-Grabbers secured to the wheels . the wheels spin to the point where the Trac-Grabbers engage . lift . grab . and move the vehicle back to stable terrain. Trac-Grabbers provide a quick . simple . and effective solution to being stranded and disabled in all types of terrain and adverse conditions. The Trac-Grabber block dimensions for Car/Van/ATV Trac-Grabber are 8in block length . 3in block width . and 1in block depth. Just strap on a pair of Trac-Grabbers and rescue yourself! Trac-Grabber... Don't get stuck without it!