A rail is just another term for pole. Typically, Pencil Pleat is the standard heading for curtains. It consists of three rows of thread looped through it - to fit all types of poles. Eyelet curtains are specifically made for use with curtain rails. They offer modernity with their soft folds. Pinch Pleat curtains are a more decorative style. However, it is more gathered than other curtains, as it has pleats hemmed in for a deluxe look.