| Business | Phone |
| General Machining Svc 5521 W 110th St 6, Oak Lawn 60453 | (708) 636-4848 |
| Demco Products 4644 W 92nd St, Oak Lawn 60453 | (708) 636-6240 |
| Meyer Tool & Mfg Inc 4601 Southwest Hwy, Oak Lawn 60453 | (708) 425-9080 |
| Quality Machine 5530 W 110th St, Oak Lawn 60453 | (708) 499-0021 |