| Business | Phone |
| B & B Precision Wire Edm Inc 136 Industry Ln # 4, Forest Hill 21050 | (410) 638-8287 |
| B & R Grinding 107 E Jarrettsville Rd, Forest Hill 21050 | (410) 893-1821 |
| Diversified Machining Inc 129 E Jarrettsville Rd, Forest Hill 21050 | (410) 879-1400 |
| Jacobs Machine Sales Inc 2823 Ady Rd, Forest Hill 21050 | (410) 879-6520 |
| Omega Manufacturing 500 Bynum Rd # B, Forest Hill 21050 | (410) 803-9512 |
| Poplar Machine Co 132a Industry Ln # 3, Forest Hill 21050 | (410) 893-1420 |
| Quality Machine Co 334 Bynum Rd, Forest Hill 21050 | (410) 838-2017 |
| Quality Metal Products 102 Industry Ln, Forest Hill 21050 | (410) 879-0284 |
| Sellers Machine 2656 Bailey Rd, Forest Hill 21050 | (410) 557-8990 |
| Surface Technologies Inc 117 Industry Ln, Forest Hill 21050 | (410) 836-9940 |
| Turbo Machine Co 138 Industry Ln # 5b, Forest Hill 21050 | (410) 879-4405 |