The focus of the proxy battle and the source of Birmingham's financial woe is the division that makes high-grade bar steel for critical applications like seatbelt bolts and motor shafts.

FORBES: Iron Wills

Putting more than half a million road miles on development versions of the Spark EV enabled engineers to make the performance of the electric motor the best it could be by using a bar wound copper stator and unique rotor configuration.

ENGADGET: Chevy Spark EV rated most efficient retail car with 82-mile range, 119 MPGe

If the door motor is working overtime all afternoon long, for example, they see a tall red bar on a chart.

FORBES: Magazine Article