| Business | Phone |
| Caspersen Machining Corp 705 Stokely Dr, De Forest 53532 | (608) 846-8000 |
| Chapman Fabrications Inc 4201 County Road V, De Forest 53532 | (608) 592-7259 |
| Tech Mold Corp 116 Antique Ln, De Forest 53532 | (608) 846-5010 |
| Jorge Bolanos Machine Shop 513 Yorktown Rd, De Forest 53532 | (608) 846-5217 |