This Corded Contour Aluminium rail is designed for use with all curtain types including heavy weight curtains, with a built-in smooth action pulley system which has a ready corded two way draw at both sides. 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. Child cord safety guides included. Track can be trimmed to any size.