The product is a set of 4 wheel adapters designed for GMC vehicles, specifically changing a 6x5.5 inch bolt pattern to a 5x4.75 inch bolt pattern. Made of aluminum, these adapters have a spacer thickness of 50mm (2.0 inches). The adapters are designed for both front and rear wheels, with a manufacturer part number of 2" 6x5.5 to 5x4.75 and a hub bore size of 108mm to 87mm. The brand is KYX, a reputable manufacturer of automotive parts.