Master Key Services Maryland

Master key systems are used by universities, government offices and other large facilities to control access, maintain security and improve an organization’s ability to respond in an emergency. As the name implies, master keys are capable of unlocking all doors in a building. It’s also possible to create sub-levels — for example, having a single key that can open all office doors, but will restrict access to rooms where confidential information is stored.

Installing a master key system can be an involved process. Any mistakes or oversights can put your organization at risk. That’s why it’s so important to work with a skilled, knowledgeable locksmith. Not every company has the training and experience necessary to get the job done right.

Maryland’s Best Master Key Locksmith

Ernie’s Lock Company, Inc. has a long history of installing master key systems for Maryland businesses. We can help you put together a system that addresses your specific access control needs and perform the installation in a timely manner. Having been in business since 1960, you can be certain we’ll be around to provide maintenance and other services for the long term.

If your facility isn’t suited to a master key-type setup, we can recommend an alternative, whether it’s keypad access system or something more sophisticated. Our knowledge and experience with setting up Master Key Systems has given us recognition as one of the most reliable and best locksmiths in Maryland!

Request a Locksmith Consultation Today

Our team of licensed technicians is available to provide master key locksmith services throughout Maryland and the DC Metro Area. We are happy to meet with you at your facility, or to put together a rough estimate over the phone. In everything we do, our goal is to provide transparent pricing and excellent communication at all times. It’s this commitment to above-board service that has made us a leading master key locksmith for some of Maryland’s most demanding businesses and government facilities.

Give us a call to get started today — no job is too big for our team!

Contact Us!

For All Your Locksmith Needs!

Our Services

    Commercial & Residential

  • High Security & Restricted Keyways
  • Key Duplication (in shop & on road)
  • Key Cutting
  • Custom Master Key Systems
  • Lock Rekeying
  • Lock Installation
  • Lock Repairs
  • Door Hardware Installation
  • Electrical Access
  • Keyless Entry
  • Safes & Vault Sales
  • Safes & Vault Unlocking Services
    Lockouts - *Within 10 Miles

  • Automotive Lockouts
  • Residential Lockouts
  • Commercial Lockouts

Store Hours

  • Monday – Friday 8 AM – 5 PM
  • Saturday – Scheduling Only
  • Sunday – CLOSED


Ernie's Lock Company, Inc. believes in full transparency when it comes to pricing! We always provide honest, competitive and up-front pricing to our customers - we don't like sticker shock. Call our licensed locksmiths today for pricing & custom quotes!


4500 Queensbury Road Riverdale, Maryland 20737