Brilliant new design from Fuji here. They really do make a great fishing rod guide.
The new K series guide has been developed as a tangle free guide for use with modern braided lines. The unique design allows wind knots and tangles to untangle easily without angler intervention.
The design of K-Series guides enhances the effect of “Rapid Choke” due to the 30-degree slope of the frame and ring. Fuji engineers do not claim that the slope makes Rapid Choke possible, only that the downward facing ring enhances the effect and contributes to overall performance. Because of this effect, Fuji has chosen to expand the K-Series product line as the guide frame of choice for “Fuji KR CONCEPT” layouts.