TL Shield TL Shield & Associates has been installing stairlifts for over 25 years. We understand who will be using the chair and how important the reliability of the unit is to them. Our properly trained, certified technicians are licensed, bonded and insured. Please call us today at 1-800-954-3343 for a free consultation. Our Southern California office primarily provides stair chairs to Los Angeles, Orange County, and San Diego and our Northern California office provides stairchairs to Sacramento, San Francisco, and San Jose. But we are able to serve all cities in California for Stair Lifts and Stair Chairs so please contact us to discuss your needs.