| Business | Phone |
| Austin Machine 804 Texas Ct, O Fallon 63366 | (636) 240-3590 |
| Southtowne Machining Inc 808 Corporate Centre Dr, O Fallon 63368 | (636) 447-5521 |
| Planet Tool & Engineering 315 S Cool Springs Rd, O Fallon 63366 | (636) 379-9800 |
| Elite Tool & Machinery Systems 311 S Cool Springs Rd, O Fallon 63366 | (636) 240-6106 |
| Drury Tool & Machine Co 963 Hackmann Rd, O Fallon 63366 | (636) 978-1600 |