| Business | Phone |
| Inductoheat Inc 32251 N Avis Dr, Madison Heights 48071 | (248) 585-9393 |
| Ajax Tocco Magnethermic Corp 32350 Howard Ave, Madison Heights 48071 | (248) 585-1140 |
| Ajax Tocco Magnethermic Corp 32442 Industrial Dr, Madison Heights 48071 | (248) 589-2524 |
| Efd Induction 31511 Dequindre Rd, Madison Heights 48071 | (248) 658-0700 |