| Business | Phone |
| Amormino Machining & Design 21500 Broadway, Sonoma 95476 | (707) 996-0822 |
| First Turn Inc 29223 Arnold Dr, Sonoma 95476 | (707) 996-5928 |
| Precise Tool & Die 1630 Lovall Valley Rd, Sonoma 95476 | (707) 938-1138 |
| Sonoma Machine Works 23323 Ramal Rd, Sonoma 95476 | (707) 996-8629 |
| Weldon Machine Works 20970 5th St E, Sonoma 95476 | (707) 938-5022 |