| Business Name | Address | |
| Grinnell Safe & Lock Co | 101 1st Ave E Newton, IA 50208 |
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| A-1 Lock Inc | 807 S 10th Ave E Newton, IA 50208 |
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| B & T Lock | 105 S 3rd St Knoxville, IA 50138 |
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| Grinnell Safe & Lock Co | 800 Main St Grinnell, IA 50112 |
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| Security Locksmiths | 4410 Se 14th St Des Moines, IA 50320 |
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