This is not a fixed type commonly found in mass-produced products, but one that allows you to adjust the magnetic brake while fishing. Also, although it may interfere and slightly degrade the operability, the line alarm can still be used after this product is installed. Why not aim for ultra-long casting with a contactless magnetic brake instead of the centrifugal brake that uses friction? (It can also be used in conjunction with a centrifugal brake) You can find your favorite setting because it is infinitely adjustable by turning the screw. This product utilizes existing holes and frames, so there is no impact on the reel body such as drilling. Operation has been confirmed only on models with a line alarm for the Ambassador 6500, so it is unknown whether it is compatible with other models. Included items: Base parts, 2 magnets, adjustment screws, spacers, E-rings *Please note that there may be some burrs or color variations due to 3D printing. Please understand that we cannot be held responsible for any damage or breakage to the reel caused by using this product.