| Business | Phone |
| Ace Tool & Engineering Inc 890 Pannell Ave Nw, Grand Rapids 49504 | (616) 361-4800 |
| American Design & Machine 430 Cummings Ave Nw, Grand Rapids 49544 | (616) 791-4856 |
| Cnc Engineering Inc 4387 4 Mile Rd Ne, Grand Rapids 49525 | (616) 456-5500 |
| Hansen Machine & Tool 900 Pannell Ave Nw, Grand Rapids 49504 | (616) 361-2842 |
| Leitelt Iron Works 2307 Turner Ave Nw, Grand Rapids 49544 | (616) 363-3817 |
| Kingsbury Corp 900 Oakhurst Ave Nw, Grand Rapids 49504 | (616) 453-0439 |
| Tuff Automation Inc 2751 Courier Dr Nw, Grand Rapids 49534 | (616) 735-4351 |
| Trace Industries 3315 3 Mile Rd Nw B, Grand Rapids 49534 | (616) 791-9070 |