| Business | Phone |
| Centerline Industries 665 Commercial Ave, Waterloo 53594 | (920) 478-3894 |
| Forward-Dietz Tool 186 Schultz St, Waterloo 53594 | (920) 478-1110 |
| Sussek Machine Corp 805 Pierce St, Waterloo 53594 | (920) 478-2126 |
| Centerline Machinists 320 Portland Rd, Waterloo 53594 | (920) 478-3893 |