Probably the design that most people associate with Patio Doors. 'In-Line' simply refers to the way the door panes slide on parallel tracks. This is the earlier of the two designs, robust easy glide system, fitted with safety glass as standard and high security multi-locks. Security is further enhanced with anti-lifting mechanism. 

Can be utilised with mid-rails, letter plate, panels and decorative glazing as required. Click on the images below to see a larger example.