| Business | Phone |
| Reinke Wholesale Supply Co 1619 S State St, Chicago 60616 | (312) 427-1331 |
| Meinhardt Diamond Tool Co 3800 W Belmont Ave, Chicago 60618 | (773) 267-3260 |
| Reliable Steel Rule Die Co 3401 N Kedzie Ave, Chicago 60618 | (773) 539-1112 |
| Sharp Edge Knife Co 1541 N Elston Ave, Chicago 60622 | (773) 523-1440 |
| Sensible Products 6567 N Olmsted Ave, Chicago 60631 | (773) 774-7400 |
| Zim Manufacturing Co 6100 W Grand Ave, Chicago 60639 | (773) 622-2500 |
| Ogden Industries 4108 W Ogden Ave, Chicago 60623 | (773) 238-7900 |
| Carl Zeiss Inc 4613 S Fairfield Ave, Chicago 60632 | (773) 247-3926 |
| Combined Products 4006 W Belden St, Chicago 60639 | (773) 278-5152 |
| Modern Specialties Co 661 W Lake St, Chicago 60661 | (312) 648-5800 |