| Business | Phone |
| A-1 Grinding 7633 Cypress Ave, Riverside 92503 | (951) 637-0809 |
| Acro-Spec Grinding Co Inc 4134 Indus Way, Riverside 92503 | (951) 736-1199 |
| Anacapa Co 11550 Anacapa Pl, Riverside 92505 | (951) 688-7500 |
| I & S Precision Grinding 11047 Whitford Ave, Riverside 92505 | (951) 689-3118 |
| Vern's Precision Form Grinding 12301 Doherty St, Riverside 92503 | (951) 734-0290 |
| Rigo's Grinding 2431 Rubidoux Blvd # 31, Riverside 92509 | (951) 787-8411 |