| Business | Phone |
| R & M Industries Co 4915 Leafdale Blvd, Royal Oak 48073 | (248) 280-0078 |
| Progressive Stamping Co 2807 Samoset Rd, Royal Oak 48073 | (248) 549-0042 |
| Olsen Manufacturing Co 4353 Delemere Blvd, Royal Oak 48073 | (248) 549-4200 |
| H S Die & Engineering Co 1912 Bellaire Ave, Royal Oak 48067 | (248) 541-0880 |