| Business | Phone |
| Austin's Auto Machine 1459 N Ranger Dr, Covina 91722 | (626) 938-1094 |
| Barney's Precision Products 807 W Front St, Covina 91722 | (626) 858-6051 |
| Film Illusions Inc 708 E Edna Pl, Covina 91723 | (626) 974-5896 |
| G & K Machine Co 1236 E Edna Pl, Covina 91724 | (626) 331-1663 |
| G & M Precision 1580 W San Bernardino Rd # D, Covina 91722 | (626) 966-6289 |
| Noram Corp 1079 E Edna Pl, Covina 91724 | (626) 967-4422 |
| S H Precision Products 810 W Front St, Covina 91722 | (626) 331-1328 |
| Short Run Swiss Inc 714 E Edna Pl, Covina 91723 | (626) 974-9373 |
| 5 Boys Precision Machining 1508 W Industrial Park St # A, Covina 91722 | (626) 339-7644 |
| Avalon Industries 1526 W Industrial Park St, Covina 91722 | (626) 915-7775 |
| Esparzas Machine Works 1524 W Industrial Park St # A, Covina 91722 | (626) 332-8793 |
| Futrell's Machine Products Inc 784 W Front St, Covina 91722 | (626) 339-6430 |
| High Tech Precision 1516 W Industrial Park St, Covina 91722 | (626) 332-8842 |
| Mc Kay Swiss Products 719 Arrow Grand Cir, Covina 91722 | (626) 966-7541 |
| Milli-Fab Inc 1508 W Industrial Park St, Covina 91722 | (626) 332-6197 |
| Monterey Machine Products 1504 W Industrial Park St # A, Covina 91722 | (626) 967-2242 |
| P M Turning 1530 W Industrial Park St, Covina 91722 | (626) 732-0995 |
| Pbs Tool 1534 W Industrial Park St, Covina 91722 | (626) 967-6367 |
| R M Baker Machine & Tool 815 W Front St, Covina 91722 | (626) 967-1079 |