KR Concept is a game changer in terms of great performance at lighter weights. KR Guide trains are lighter than anyone could have imagined just a few years ago. Although Fuji developed the concept with special attention to the “micro” craze, in the final review they realized the parameters were appropriate for any braided line and for conventional “non-micro” rods as well. Ultimately, KR Concept has impact far beyond micro rods and is an advance in the performance of any rod using braid and most rods using monofilament or fluorocarbon lines. The K- Series Guides in this section are designed specifically for builders wanting to apply the KR Concept to a wide variety of finished rods.