| Business | Phone |
| Abrasive Diamond Tool Co 30231 Stephenson Hwy, Madison Heights 48071 | (248) 588-4800 |
| Bokum Tool Co Inc 32301 Dequindre Rd, Madison Heights 48071 | (248) 585-0222 |
| Borite Mfg Corp 31711 Sherman Ave, Madison Heights 48071 | (248) 588-7260 |
| Broaching Specialties 1500 E 11 Mile Rd, Madison Heights 48071 | (248) 547-0730 |
| Royal Design & Mfg Inc 32401 Stephenson Hwy, Madison Heights 48071 | (248) 588-0110 |