mulhollandsecurity.com. Call us at 1-800-562-5700. With our electronic locks, we can swap out the cylinders in your conventional system with this modern, more fail proof way. This will help you secure your family, pets, property and valuables. With security, you will have more freedom to do and enjoy the things that are important to you. Your family will appreciate you for doing the things that are necessary to safeguard them from harm. Amongst the most important things that you can do for your family is to help them become more safe and secure. Every installation comes with a warranty and guarantee. We are A Plus rated with the BBB and have won the AngiesList Super Service Award every year since 2010. As far as we know, we are the longest continually-in-service company of our kind in all Los Angeles. We also have 24/7 emergency service, should you have any difficulty in securing your home or business. We don't outsource any of our products or services. We are 100% comprehensive in all things security, whether that be for residential or commercial.