| Business | Phone |
| Chesapeake Lock & Safe Svc Co 494 Main St, Prince Frederick 20678 | (301) 855-9131 |
| John's Locksmith Svc 20 Armory Rd, Prince Frederick 20678 | (410) 535-0580 |
| Rawlings Lock Co 6027 Daybreak Dr, Prince Frederick 20678 | (301) 855-9295 |
| T & K Locksmith Po Box 2247, Prince Frederick 20678 | (410) 535-2659 |