I love these.  You can easily spot your bag on the baggage belt when you crisscross them on your bag.  That is, put one on the length and the other on the width.  It prevents accidents too, in case your zipper should fail, what with all the throwing around that happens.  They adjust long enough so that one can easily go around even the largest wheel bag, and they are strong too.  The color is so bright that I spotted my dull blue bag instantly!