All our window and most door hardware is 3d adjustable. The 3d adjustability (adjustable in all directions) is a must for a window or door that is designed to last a lifetime. Many things can happen in time (e.g. earthquakes, settling of the building, extreme winds) that can cause ordinary windows stick in the frame. With Eurotech WinDoors you have the unique ability to adjust the sash in the frame yourself – with the simple use of an allen key.