What I've always rumgefummelt and cursed the morning and evening curtains move. In women everything must always a bissl decorative hanging .. However, slipping the eyes constantly from too large end openings or remained the curtains visually never at the same height stand. The small parts are inconspicuous, fixed mounted and have an extremely low price - particularly in relation to the effect they bring. The first part I am still employed and geschnauft. But one should not think that complicated. Just pure (the plastic crescent contrary to the rail direction align easily) and tighten. Do not twist apart, most loosen slightly to introduce it better. Tighten - done. Can be between terminals at any location.