| Business | Phone |
| Anchor Lamina Inc 95 E 10 Mile Rd, Madison Heights 48071 | (248) 547-5910 |
| Valenite Inc 31700 Research Park Dr, Madison Heights 48071 | (248) 589-7559 |
| Stevens Tool Co 322 W 10 Mile Rd, Madison Heights 48071 | (248) 542-2247 |
| Plaster Development & Plastics 32801 Dequindre Rd, Madison Heights 48071 | (248) 585-1770 |
| P X Tool Co 32354 Edward Ave, Madison Heights 48071 | (248) 585-9930 |
| Penka Tool Corp 1717 E 10 Mile Rd, Madison Heights 48071 | (248) 543-3940 |
| Gage Pattern & Model Inc 32070 Townley St, Madison Heights 48071 | (248) 585-9352 |