| Business | Phone |
| Tuff Machine Co 25770 Groesbeck Hwy, Warren 48089 | (586) 774-8680 |
| B J Industries Inc 14440 Barber Ave, Warren 48088 | (586) 778-7200 |
| Gollnick Tool Co 24300 Marmon Ave, Warren 48089 | (586) 755-0100 |
| Grapar Corp 25133 Flanders Ave, Warren 48089 | (586) 773-5250 |