The posterior rods play a crucial role in maintaining accurate posterior articulation when there are no teeth to naturally stop the bite. To utilize these stop rods, simply insert one side into the diamond-shaped hole at the posterior of the articulator until the rod reaches the other side. Secure the rod in place with adhesive at the point where you inserted it through the diamond-shaped hole. Each order includes a set of 20 stop rods, ensuring you have an ample supply for your needs.