The gate wheel helps reduce stress on posts and hinges by taking some of the pressure off of them and onto the gate wheel its self. The gate wheel also helps prevent the end of the gate from sagging over time with heavy metal gates. Help stop gravity with our rigid constructed gate wheel. They are made of heavy gauge galvanized steel with a rubber compound wheel. For a more permanent fitment, you can tack weld the gate wheel mounting bracket right to your metal fence gate.