Alignment Rods

If you ever attended a TOUR EVENT or just watch a Tournament more likely or not those players will have Alignment Rods in there golf bags. As a teaching pro I have least 8 of them. So what do I use mine for???1. Alignment both Full Swing an Short Game, Ball position, Putting, Swing Path and Etc. They can be bought at any golf store or go to your local LOWES or Home Depot.