| Business Name | Address | |
| Central Lock & Key | 1400 S Taft Ave Mason City, IA 50401 |
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| Abc Lock Svc | 2209 2nd Ave S Clear Lake, IA 50428 |
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| Abc Lock Svc | Po Box 433 Clear Lake, IA 50428 |
|
| Shorty'S Lock | 507 N Iowa St Charles City, IA 50616 |
|
| Viking Glass & Lock | Albert Lea, MN 56007 | |