Tri County Lock is a family operated locksmith & commercial door company with locations in North Aurora, St Charles and West Chicago. We work in the security industry so trust and safety are very important to us and our customers. We offer professional same day service at affordable rates. The technician who performs work at your home or office has over 15 years experience in the locksmith trade and has no criminal background. Commercial locks & steel door replacement is our specialty. Call Tri County Lock for a free quote today!