| Business | Phone |
| Jason Tool & Engineering Inc 5381 Ridge Ct, Troy 48098 | (586) 294-1170 |
| Wolverine Carbide Die Co 2613 Industrial Row Dr, Troy 48084 | (248) 280-0300 |
| Yarema Die & Engineering 283 Minnesota Dr, Troy 48083 | (248) 585-2830 |
| Trident Engineering 1755 Austin Dr, Troy 48083 | (248) 524-1344 |