This small spool holder is ideal for making tight turns around the fly’s head. Adjust its drag to ensure a smooth release of line, then adapt the tension to the line and the fragility of the materials. The guide features a hardened steel ring that protects the line from friction as it exits. The stainless steel construction is the same as that of the larger BK528. The choice between the two therefore comes down primarily to which size you prefer to hold in your hand.