| Business | Phone |
| Rock Valley Die Sinking 2457 Baxter Rd, Rockford 61109 | (815) 874-5511 |
| Federal Forging Die 2009 Parmele St, Rockford 61104 | (815) 968-6387 |
| Forgings & Stampings Inc 1025 23rd Ave, Rockford 61104 | (815) 962-5597 |
| General Forging Die Co 4635 Hydraulic Rd, Rockford 61109 | (815) 874-4224 |
| Itw Shakeproof Ind 2316 23rd Ave, Rockford 61104 | (815) 226-3025 |