| Business | Phone |
| Aba Locksmith Llc Po Box 192, Frederick 21705 | (301) 371-0552 |
| Able Locksmiths Llc 321 W Patrick St # A, Frederick 21701 | (301) 662-7275 |
| Automotive Industrial Inc 1103 E Patrick St, Frederick 21701 | (301) 662-2211 |
| D & D Safe & Lock 5430 Mount Zion Rd, Frederick 21703 | (301) 473-7133 |
| D & D Safe & Locks 33 E Patrick St, Frederick 21701 | (301) 695-6110 |
| Eagle Lock & Security Frederick 21701 | (301) 624-5555 |
| Gene's Lock Svc 5744 Industry Ln # B, Frederick 21704 | (301) 663-1280 |
| R J Locksmith & Security Inc 7945 Old 7th St, Frederick 21702 | (301) 695-7878 |
| Pro Door & Key 45 Thomas Johnson Dr Ste 105, Frederick 21702 | (301) 660-3804 |