| Business | Phone |
| Borerite Inc 371 Prospect Ave B, Hartland 53029 | (262) 369-0440 |
| Sullivan Corp 460 Cardinal Ln, Hartland 53029 | (262) 369-7200 |
| Genesis Machining Inc 300 Pawling Ave, Hartland 53029 | (262) 367-1131 |
| Rabay Machining Technologies 550 Progress Dr, Hartland 53029 | (262) 367-4340 |
| Goff's Industrial Aid Mach Inc 633 Progress Dr, Hartland 53029 | (262) 367-3215 |
| Hartland Tool & Mfg Inc 463 Progress Dr, Hartland 53029 | (262) 367-8633 |
| Heritage Manufacturing Inc 430 E Industrial Dr, Hartland 53029 | (262) 369-0355 |
| Neosho Trompler Inc 580 S Industrial Dr, Hartland 53029 | (262) 367-5600 |
| Kapco Machine Ltd 501 Progress Dr, Hartland 53029 | (262) 367-1060 |
| Leaf Technology Inc 512 E Industrial Dr, Hartland 53029 | (262) 369-2260 |