A1 Interlock Devices provides Interlock Devices and breathalyzers in Salt Lake City, Sandy, Lehi, Riverton, West Jordan, Orem, Provo and more. We offer the best choice for you by providing the best customer service, contract management and installation are both managed in state. We are locally owned and operated. We install, service and handle the contracts by a locally owned company. We give you fast, friendly and professional ignition interlock service, and be rest assured that we understand your needs. Look no further to book your appoint with us now.