| Business | Phone |
| Wade Grinding & Mfg Co 8631 E 9 Mile Rd, Warren 48089 | (586) 754-2640 |
| Tri-County Precision Grinding 21960 Schmeman Ave, Warren 48089 | (586) 776-6600 |
| Roy Lee Montgomery 24275 Mound Rd, Warren 48091 | (586) 756-8844 |
| Multi Grinding Inc 6877 Miller Dr, Warren 48092 | (586) 268-7388 |
| National Grinding Inc 22534 Groesbeck Hwy, Warren 48089 | (586) 775-7016 |
| Grinding Products Co Inc 11084 E 9 Mile Rd, Warren 48089 | (586) 757-2118 |
| Ledbetter Grinding Svc Co Inc 11542 E 9 Mile Rd, Warren 48089 | (586) 756-7358 |
| Jhs Grinding 24700 Mound Rd, Warren 48091 | (586) 427-6006 |