The LS F drag is based on the conical system found in our other reels with the addition of a click stop drag knob, and a unique spring set that creates a linear progression of torque with very fine resolution at the light end of its range. LS F spool and frame architecture is super-arbor in scale for high retrieve, but spare and open to promote line drying and of course, reduce weight. Manufactured in the U.S.A. and assembled in Boise, Idaho.