| Business | Phone |
| Industrial Steel Inc 533 37th Ave Ne, Columbia Heights 55421 | (763) 781-3292 |
| S & S Centerless Grinding Inc 545 37th Ave Ne, Columbia Heights 55421 | (763) 781-2405 |
| Microform Grinding 4857 University Ave Ne, Columbia Heights 55421 | (763) 571-0067 |