What stabilizing tool uses a system of at least three posts wedged between the ground and a vehicle resting on its side or top?

The stabilizing tool that effectively uses a system of at least three posts wedged between the ground and a vehicle resting on its side or top is the buttress tension system. This system is designed to provide stability to overturned vehicles by employing a combination of posts and tensioning elements that counteract the forces acting on the vehicle. By distributing weight and providing a secure anchoring point, it ensures that the vehicle remains stable during recovery operations.

Other methods of stabilization may not employ the same structural setup with posts or may not provide the level of control needed for such scenarios. For instance, a strut system may utilize fewer points of contact, which could lead to instability under certain conditions. A chain tension system typically uses chains for securing objects rather than providing direct support and stability. The stability frame could refer to a different tool that may not involve the same specifics of supporting an overturned vehicle as effectively.

Thus, the buttress tension system stands out due to its specific design and function tailored to the challenges associated with handling vehicles in compromised positions.