| Business Name | Address | |
| Ahrens Lock & Safe | 200 Cleveland St Cary, IL 60013 |
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| Barrington Lock Shop | 4702 Il Route 176 Crystal Lake, IL 60014 |
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| Northern Key & Lock Inc | 4702 E Terra Cotta Ave Crystal Lake, IL 60014 |
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| Northern Key & Lock Svc Inc | 4702 State Route 176 Crystal Lake, IL 60014 |
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| A-Able Alarm Svc Inc | Crystal Lake, IL 60014 | |