| Business | Phone |
| Werner Machine 600 Kirk Rd Nw, Marietta 30060 | (770) 919-1056 |
| Tooling Innovations Inc 778 Atlanta Rd Sw, Marietta 30060 | (678) 354-5446 |
| Diamond Holding Corp 150 Marr Ave Nw, Marietta 30060 | (770) 795-8556 |
| Engine Research 1111 Shallowford Rd, Marietta 30066 | (770) 591-0400 |
| Finite Precision Machining 503 Commerce Park Dr Se, Marietta 30060 | (770) 420-2711 |
| Stanley Machining & Tool Corp 3834 Upland Dr, Marietta 30066 | (770) 509-1992 |
| Higginbotham & Assoc 530 Commerce Park Dr Se, Marietta 30060 | (770) 424-3135 |
| Preferred Machine Works Inc 4708 Ecton Dr, Marietta 30066 | (678) 494-6622 |
| Apex Machine Works 1109 Cobb Pkwy S, Marietta 30060 | (770) 795-7695 |
| Diamond Roller Systems Corp 150 Marr Ave Nw, Marietta 30060 | (770) 590-9991 |