| Business Name | Address | |
| Grinnell Safe & Lock Co | 800 Main St Grinnell, IA 50112 |
 |
| J & S Locksmith | 214 N Broadway St Toledo, IA 52342 |
|
| Grinnell Safe & Lock Co | 101 1st Ave E Newton, IA 50208 |
|
| A-1 Lock Inc | 807 S 10th Ave E Newton, IA 50208 |
|
| Tri-State Lock Svc | Po Box 1176 Marshalltown, IA 50158 |
|