| Business | Phone |
| Ace Lock & Safe Co 1003 Woodbourne Ave, Baltimore 21212 | (410) 235-3400 |
| Safeworks 1820 Parkman Ave, Baltimore 21230 | (410) 750-7900 |
| United Security Alarms 6008 Harford Rd, Baltimore 21214 | (410) 254-9070 |
| Brad's Safe and Lock Service, Inc. P.O. Box 675, Baltimore 21136 | (410) 526-0200 |