| Business | Phone |
| Akro Tool Co 240 Donald Dr, Fairfield 45014 | (513) 858-1555 |
| B K Tool Co 300 Security Dr, Fairfield 45014 | (513) 870-9622 |
| Bowling Precision Machining 8625 Seward Rd, Fairfield 45011 | (513) 860-3469 |
| Kole Specialties 4695 Industry Dr # A, Fairfield 45014 | (513) 829-1111 |
| Machintek Corp 3721 Port Union Rd, Fairfield 45014 | (513) 942-4500 |
| Nail Mark Inc 4777 Industry Dr # D, Fairfield 45014 | (513) 829-6180 |
| Northend Gear & Machine Co 475 Security Dr, Fairfield 45014 | (513) 860-4334 |
| Northern Precision 3210 Homeward Way # B, Fairfield 45014 | (513) 860-4701 |
| Positech Corp 3130 Homeward Way, Fairfield 45014 | (513) 942-7411 |
| R & F Metal & Svc 9201 Seward Rd, Fairfield 45014 | (513) 874-7132 |
| Rks Tool & Die Co 200 Security Dr, Fairfield 45014 | (513) 870-0225 |