Give your car's wheels a clean, finished look and some extra protection with these simple hub caps. This set comes with four black caps that snap right into the center of your wheels, covering the lug nuts and bearing hub. They're made from durable, electroplated plastic that has a nice glossy finish and won't rust. The main job? To keep dust, road grime, and water from getting into the center of your wheel, which helps prevent corrosion on your lug nuts and wheel bearings. They measure about 2.36 inches in outer diameter with a 2.2-inch inner opening. They have a clever lug buckle design with a reinforcing steel ring inside, so they clip on securely and won't pop off on bumpy roads. An easy, cheap way to make alloy or steel wheels look tidier and add a bit of personal style. Just press them in—no tools needed.