Serving The Entire Bay Area since 1955
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foster brother

The ideal solution for motel, apartment or any residential or commercial application where security, durability and budget are concerns. Interconnected heavy duty 1 inch deadbolt retracts simultaneously with latchbolt by turning inside knob/lever.

foster brother

Marks USA Cylindrical Locksets are designed for use in situations where durability is the deciding factor. Our cylindrical lock chassis are all constructed with cast retractors on bronze roller bearings. This strong, durable component gives our cylindrical sets the ability to last millions of cycles and is available in knob and lever sets.

foster brother



The Arrow Revolution stand alone touchscreen lock combines the functional elements of a cylindrical lockset with the latest technological designed for electronic aesthetic.

foster brother
foster brother

Foster Brothers

We Are Your Security Experts

Located in the heart of Silicon Valley, Foster Brothers Security Systems, Inc. has been satisfying the locksmith and security requirements of business and the industrial sector in the San Francisco Bay Area for over thirty-five years. As the valley grew, Foster Brothers has grown to meet the needs of our hundreds of customers, providing them with security systems, locks and keys, as well as access control devices. Our clients include some of the biggest companies in the nation. We have always taken pride in providing our customers with quick, professional and economical solutions.

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