US Patent 7948747 Hard drive rail for hard drive carrier

A rail apparatus includes first plate formed of a synthetic material having a first face and a second face opposite the first face, the first plate having a plurality of rows of spaced apart rail protrusions in a first pattern protruding from the second face of the first plate. A second metal plate includes a first face and a second face opposite the first face, the second plate having a plurality of rows of spaced apart slots in a second pattern matching the first pattern and extending through the first and second faces of the second plate. The second face of the first plate abutting the second face of the second plate, whereby the rows of rail protrusions extend through the slots and extend from the first face of the second plate.