Metal trailer hitch covers, typically made from durable carbon steel or aluminum, protect 1.25-inch to 2.5-inch receiver tubes from dirt, rust, and debris.  Popular options include decorative metal designs, such as team logos, or simple black, powder-coated steel covers. They require a hitch pin for installation and help extend the life of the towing component. 

Key Features and Considerations

• Protection: Prevents rust and corrosion by keeping snow, rain, and debris out of the receiver.

• Materials: Common materials include durable carbon steel or aluminum.

• Sizes: Most commonly fit 2-inch, 1.25-inch, or 2.5-inch receivers.

• Installation: Installed using a standard hitch pin, often requiring a pin to be purchased separately.

• Maintenance: Should be removed periodically to clean the receiver and prevent moisture buildup.

• Design: Available in various styles, including logos, emblems, and solid metal, often with powder-coated finishes. 

For long-term use, metal covers should be checked for rust periodically, as they can sometimes trap moisture.