| Business | Phone |
| Jo-Ad Industries Inc 31465 Stephenson Hwy, Madison Heights 48071 | (248) 588-4810 |
| Superior Cam Inc 31240 Stephenson Hwy, Madison Heights 48071 | (248) 588-1100 |
| D-M-E Co 29111 Stephenson Hwy, Madison Heights 48071 | (248) 398-6000 |
| Delta Precision Inc 664 Ajax Dr, Madison Heights 48071 | (248) 585-2344 |
| D-M-E Company 29111 Stephenson Highway, Madison Heights 48071 | (248) 544-5748 |