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, the line alarm can be used even after this product is installed, allowing you to use all of the original functions. Why not aim for ultra-long casting with a contactless magnetic brake instead of a 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 screw, spacer, E-ring *Please note that there may be some burrs or color variations due to 3D printing. Please understand that we are not responsible for any damage or breakage to the reel caused by using this product.