Ski-doo:

The Munster Ski-doo rail brace system is a 3 piece brace that greatly strengthens the rails and prevents them from bending. The cross brace stabilizes the back section of the rails preventing bending from side to side, as well as up and down.

Polaris:

The Munster Polaris rail brace is a 6 piece system that greatly strengthens the weak midsection of Polaris rails. Designed to sandwich the rails for ultimate strength and protection against bottom out. The threaded backing plates make it a quick and easy install.