| Business | Phone |
| Grem Machining Inc 3149 Glenwood Dyer Rd, Chicago Heights 60411 | (708) 758-1130 |
| Trio Machine Shop Inc 306 E 16th St, Chicago Heights 60411 | (708) 757-7070 |
| Wentec Inc 1110 Schilling Ave, Chicago Heights 60411 | (708) 755-4796 |
| Industrial Park Machine & Tool 3326 Butler St, Chicago Heights 60411 | (708) 754-7080 |
| Kaminsky Engineering & Mfg 3149 Glenwood Dyer Rd, Chicago Heights 60411 | (708) 758-1131 |
| On Target Grinding & Mfg 2250 199th St, Chicago Heights 60411 | (708) 418-3905 |
| S & S Machine Svc 3151 Glenwood Dyer Rd, Chicago Heights 60411 | (708) 758-8300 |