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A1 Alarm & Lock is proud to be the leading locksmith and security company in the greater Lake County, CA area, and to serve customers throughout Lake, Mendocino and Placer Counties, CA. As a family owned and operated small business with over 40 years of experience, we never cut corners and only use high quality products and practices. Our business is fully licensed, bonded and insured, and we are happy to work with both residential and commercial customers. In fact, we provide locksmithing services for automobiles as well. For more information, please give A1 Alarm & Lock a call at 707-262-1010, or fill out the contact form below.