| Business Name | Address | |
| Mr Lock & Key | 120 2nd St Nw Dyersville, IA 52040 |
 |
| Locksmith Express | 450 Central Ave Dubuque, IA 52001 |
|
| Master Key Locksmithing | Po Box 1771 Dubuque, IA 52004 |
|
| Jaeger Hardware Co | Po Box 726 Dubuque, IA 52004 |
|
| Wayne'S Lock & Key | 2119 Old Lancaster Rd Platteville, WI 53818 |
|