| Business | Phone |
| A Able Lock & Alarm 3103 W Lincoln Rd, Mchenry 60051 | (815) 943-0000 |
| A-Able Lock & Alarm Svc 3103 W Lincoln Rd, Mchenry 60051 | (815) 363-1147 |
| Aero Lock Svc 3103 W Lincoln Rd, Mchenry 60051 | (815) 344-0000 |
| North Star Lock Svc Inc 1913 N Orleans St, Mchenry 60050 | (815) 344-3337 |