Master Key Systems That Shrink the Key Ring
AUTHORITY LOCKSMITH INC · MASTER KEY SYSTEMS
A business with many doors can end up with a key ring nobody can sort out. We come out at a time that suits you, day or night, and set up a master key system so each person carries only the keys they need. Call (443) 527-1442.
Maryland Locksmith License #379 · Insured & bonded · Family owned in Baltimore since 2014 · Free estimates
One Key, Many Doors
Each lock gets its own key, and a master key opens all of them. You can also have keys that open a group of doors, such as one hallway or one floor. Whether your current locks can stay is answered in the FAQ below.
Free Estimate
Picture This
Director at the daycare door at 6:30 a.m., hunting for the right classroom key? One master key ends that.
Signs You Need a Master Key System
- Keys went home with people who left and never came back.
- Staff have keys to rooms they don't need.
- Nobody is sure which key opens which lock.
Service Area
Master key systems for businesses in Baltimore City and in Baltimore, Howard, Harford, Anne Arundel and Carroll counties.
Landlords and Apartment Buildings
Each tenant's key opens their own unit and the shared entry, while the owner's master opens every door. When a tenant moves out, only that unit gets rekeyed.
"Do Not Duplicate" Keys
We can stamp keys "Do Not Duplicate." It's a request, not a guarantee, and some copy shops ignore it. For tighter control, ask about high-security keys that can't be cut on a regular key machine.
Before We Get There
- Count the doors and locks you want in the system.
- Make a short list of who needs to get into which rooms.
- Tell us a good time to work, before or after business hours.

Good to Know
- What if a master key goes missing? A lost master key opens all the locks in the system, so keep only a few and track them. If one is lost, we can rekey the system.
- Can you use the locks we already have? Often, yes. If they're in good shape, we rekey them into the system.
- Can we add doors to the system later? In most cases, yes. We plan the system so doors can be added as your business grows.
- Is a master-keyed lock easier to pick? In theory, a little: master keying adds pins inside each lock. Good cylinders and restricted keys keep that risk small.
- Can a master key system cover our push bar doors? Many push bars (panic bars) take a key cylinder, and those can be keyed into the system. We check each door's hardware first.
See also: Business Locksmith · Rekey & Lock Change · Keypad & Smart Locks · Deadbolt Installation · Areas we serve.
What Customers Say
★★★★★ Over 100 five-star reviews on Google
"Great job fast service"
— Google review
KEY RING GETTING HEAVY?
Call (443) 527-1442 for a free estimate.
AUTHORITY LOCKSMITH INC
OPEN 24 HOURS
Call (443) 527-1442
Pay by cash, all major credit cards, Apple Pay, Apple Cash, Zelle, Venmo or Cash App.