• Welcome to R.J Lock & Security, Inc.

    Welcome to R.J Lock & Security, Inc.

    For almost two decades , R J Lock & Security of Frederick Inc has served the Frederick, Maryland area with a commitment to service and value. We appreciate your interest and look forward to earning your business.
  • Don’t Fall Victim To A Locksmith Scam!

    Don’t Fall Victim To A Locksmith Scam!

    Do your homework, ask questions and be sure to hire a locksmith who is a member of the Associated Locksmiths of America (ALOA). ALOA members adhere to a strict code of ethics and undergo rigorous training, testing and ongoing education and certification. RJ Lock & Security is registered member of ALOA.
  • Come See Us At Our New Showroom

    Come See Us At Our New Showroom

    We opened our showroom on Rosemont Avenue late 2009. We are proud to say it is the largest showroom and has the most diverse selection of keys, locks and accessories in the Frederick area. We encourage you to stop by to view our selection of products, get a key copied, or just to stop by to meet us.


Welcome to RJ Lock & Security of Frederick. We been a full service mobile locksmith in Frederick, MD for the past 20 years. In 2009 we opened our first showroom located on Rosemont Avenue right next to Pizza Hut.  Stop in and see our selection of  locks, accessories, decorative keys and fun and useful security products. And YES, we also duplicate keys. We look forward to to helping you with all of your lock & security needs in Frederick, MD. Read more about us.


Showroom & Office Hours:
Monday-Thursday: 9am-5:30pm
Friday: 9am-5pm

Locksmith Services

Mobile Locksmith Services in Frederick, MD
Showroom Locksmith Services
  • Keys Cut
  • Locks Rekeyed
  • Keys Made
  • Repair Locks
  • Decode Keys

Lock & Security Products

Lock & Security Products in Frederick, MD
  • Locks
  • Padlocks
  • Decorative Keys
  • Pepper Spray.
  • Key Chains
  • Lanyards
  • Hide-a-keys
  • Secret Compartment
  • Key Accessories
  • Badge Holders
  • Key Baks