Master Locksmith is a family-owned and -operated local company that provides locksmith services. It has been servicing residential and commercial customers in Saint Louis and other surrounding areas. It has an emergency locksmith service that assists customers who get locked out of their vehicle, home, or business. Its other services include locks change, repairs, and access control systems. The company is a member of Google's Guarantee Program. Some of the lock brands it installs are Yale and Kwikset.