| Business | Phone |
| Wico Metal Products 23500 Sherwood Ave, Warren 48091 | (586) 755-9600 |
| A & A Industries 23314 Roseberry Ave, Warren 48089 | (586) 774-3535 |
| Troy Design & Mfg Co 23751 Hoover Rd, Warren 48089 | (586) 276-5300 |
| Set Enterprises 28217 Van Dyke Ave, Warren 48093 | (586) 573-3600 |
| Royce Corp 23042 Sherwood Ave, Warren 48091 | (586) 758-1500 |
| R & D Mfg Co 22808 Sherwood Ave, Warren 48091 | (586) 757-3413 |
| Four-Slide Technology Inc 2130 E 10 Mile Rd, Warren 48091 | (586) 755-7778 |
| Flex N Gate 26269 Groesbeck Hwy, Warren 48089 | (586) 773-0800 |
| Iroquois Industries 24430 Hoover Rd, Warren 48089 | (586) 756-6921 |
| Iroquois Industries 25101 Groesbeck Hwy, Warren 48089 | (586) 771-5734 |
| Sanderson Industries Inc 24150 Gibson Dr, Warren 48089 | (586) 755-6080 |