This Contour Cordless Hand Drawn Aluminium rail is designed for use with all curtain types including heavy weight curtains, The overlap arms allow the curtains to overlap in the middle of the window to prevent light gaps and adds more privacy to your room.Super easy to install with the ceiling or wall fix keylock supports. Ideal for all shapes of windows including bays, bending inserts are included in each pack. All fixing & instructions included. Track can be trimmed to any size.