Hardy Switch Rods with Sintrix TechnologyHardy makes several models of high performance switch rods. They use Sintrix technology in most of these blanks and get high marks from anglers that prefer fast action rods and want to generate tight loops with great line speed and distance. On average they don't bend as deep or slow in comparison to some other brands. They are a very well liked rod however and deserve to be in the conversation regarding all high end, high performance switch rod and trout spey rods.