| Business Name | Address | |
| Tri-State Lock Svc | Po Box 1176 Marshalltown, IA 50158 |
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| Larry'S Towing | 909 N 3rd Ave Marshalltown, IA 50158 |
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| A-1 Lock Inc | 807 S 10th Ave E Newton, IA 50208 |
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| Grinnell Safe & Lock Co | 101 1st Ave E Newton, IA 50208 |
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| Grinnell Safe & Lock Co | 800 Main St Grinnell, IA 50112 |
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