| Business | Phone |
| Cms Technologies 36528 Grand River Ave # 1a, Farmington Hills 48335 | (248) 478-4400 |
| Midwest Security Insurance Co 33045 Hamilton Ct, Farmington Hills 48334 | (248) 553-0233 |
| Security Hardware Group 20759 Whitlock St, Farmington Hills 48336 | (248) 442-2211 |