The widest openings can be utilized for both the building’s exterior and interior entrances thanks to the development of telescopic sliding door units. When a typical sliding door cannot fit in the available space, telescopic sliding doors are a great alternative. It can slide on the wall or on its own fixed, opening in one or both directions. Telescopic doors, which slide two wings in one direction and four wings in two, provide excellent application areas with corridor-style restricted width measurements.