Our system is unlike any other product on the market – with no frames around our glass panels, we specialize in creating an “open concept” glass door system that freely slides and stacks at a 90˚ angle on the side. Opening to either the inside or the outside, each glass panel slides individually to the left or to the right, allowing the user to partially or completely open the system. Cover Glass USA’s Frameless Sliding Glass Door Systems offer clear, unobstructed views that transform spaces and allow one to live a more open lifestyle.