The fittings do not require much investigation in terms of variety and material properties, and the only notable case is in the window open and close model. Your window can have different modes according to the use of space, decoration style and personal taste. The most commonly used ones are as follows.
One way opening, opening and closing in one direction and horizontally.
Double opening, opening and closing from both sides in the axis Horizontal
two-mode opening, opening both horizontally and vertically
sliding opening, in the form of rails in both left and right directions
Arcadeonic opening, to use spaces with sufficient width
Kalangi opening, vertically from top to bottom or vice versa
axial opening , suitable for circular windows