I believe one of the most interesting parts of this piece is the rod flex comparison photos that are done with the comparable TUSA rods of equal length but being noticably heavier in weight. They say a picture is worth 1,000 words, so you only have to read the rod selling purposed commentary if you want to know more about these Nissin Pro-Square rods. Here is the link: http://www.tenkarabum.com/nissin-pro-square.html