| Business | Phone |
| Ibc Precision 1139 Centre Rd, Auburn Hills 48326 | (248) 373-8202 |
| Morgan Machining 2760 Auburn Rd, Auburn Hills 48326 | (248) 969-9888 |
| Welty Precision Machining Inc 3321 Lapeer Rd W, Auburn Hills 48326 | (248) 373-0720 |
| Apollo Machining 70 S Squirrel Rd W, Auburn Hills 48326 | (248) 852-2353 |
| R & R Tool & Gage 3355 Bald Mountain Rd 60, Auburn Hills 48326 | (248) 373-1272 |
| Precision Boring & Machine 2238 E Walton Blvd, Auburn Hills 48326 | (248) 371-9140 |