<Tr> <Th_colspan="2"> Single by Jim Croce </Th> </Tr> <Tr> <Th_colspan="2"> from the album Down the Highway </Th> </Tr> <Tr> <Th> B - side </Th> <Td> "Stone Walls" </Td> </Tr> <Tr> <Th> Released </Th> <Td> December 1975 </Td> </Tr>

It's the sound of the man working on the chain