| Business | Phone |
| Arrow Machine Industries 340 Vernon Way, El Cajon 92020 | (619) 442-9726 |
| Bear Machine Inc 1044 Pioneer Way # K, El Cajon 92020 | (619) 588-1722 |
| C & S Machining 1957 Friendship Dr, El Cajon 92020 | (619) 596-5860 |
| Cemw Inc 14372 Olde Highway 80, El Cajon 92021 | (619) 561-5550 |
| Cerco Tool & Manufacturer 555 Raleigh Ave, El Cajon 92020 | (619) 593-9487 |
| Diversified Technology-Dvlpmnt 215 Denny Way, El Cajon 92020 | (619) 258-8443 |
| Emberton's Machine & Tool Inc 1215 Pioneer Way # A, El Cajon 92020 | (619) 588-7726 |
| Socal Machine Inc 14310 Olde Highway 80, El Cajon 92021 | (619) 443-7878 |
| S R Fox Inc 1100 N Magnolia Ave # D, El Cajon 92020 | (619) 588-2111 |
| Roling Engineering & Machining 1920 Cordell Ct # 103, El Cajon 92020 | (619) 562-9070 |
| Rem Machine 481 Cypress Ln, El Cajon 92020 | (619) 593-4803 |
| Reyes Machining 1364 Pioneer Way, El Cajon 92020 | (619) 590-1664 |
| Precision Billet Inc 340 Vernon Way # E, El Cajon 92020 | (619) 448-4508 |
| G A Machine 1050 Pioneer Way # J, El Cajon 92020 | (619) 588-1911 |
| Mathews Machinery Inc 1475 Pioneer Way, El Cajon 92020 | (619) 441-3690 |
| Goodsell Machine 1282 Pioneer Way, El Cajon 92020 | (619) 440-1070 |
| Griffith's Machining 465 Vernon Way, El Cajon 92020 | (619) 401-7624 |
| M B Manufacturer 215 Denny Way, El Cajon 92020 | (619) 562-1162 |
| H P Machining 15659 Creek Hills Rd, El Cajon 92021 | (619) 596-6189 |
| Liddle Machine 1276 Pioneer Way, El Cajon 92020 | (619) 440-1276 |
| High Precision Grinding 1130 Pioneer Way, El Cajon 92020 | (619) 440-0303 |
| Industrial Research Machine 1306 Fayette St, El Cajon 92020 | (619) 258-1503 |
| Jiffy Machine & Welding 1675 N Magnolia Ave, El Cajon 92020 | (619) 448-6744 |
| John Mummert Machine 242 Denny Way, El Cajon 92020 | (619) 596-0312 |
| Laudeman Engineering 1840 Joe Crosson Dr, El Cajon 92020 | (619) 258-0134 |
| Krewson Tool & Development Inc 1100 Pioneer Way, El Cajon 92020 | (619) 579-3440 |