This custom part allows for brake adjustment with a single screw without opening the side cover during fishing trips, unlike the fixed type common in mass-produced products. ■ Features of this product Reaching the Limit of Distance: From centrifugal brakes using friction to contactless control using magnetic force. Supports ultra-long casting with lower resistance spool rotation (can also be used in conjunction with centrifugal brakes). Stepless Adjustment on Site: Adjust the brake strength in millimeters to suit the situation by tightening the screw. The best setting can be found immediately. No Modification of the Reel Body Required: Installs using existing holes and the frame, so there is no need to cut or drill into your valuable reel. Line Alarm Compatible: Although the operability will change slightly due to some interference, the line alarm function can be used even with this product installed. ■ About Compatible Models Models using part list number: 44685. Operation has been confirmed on Ambassador 6500 and 6501 (left-handed). User Information (Reference): We have received reports from purchasers that it is also compatible with models other than the 6500 (VIP models, etc.). Although not recommended, we hope this is helpful. ※ Even if the above conditions are met, it may be excluded in rare cases due to individual differences or changes in model specifications. ■ Included Items Mag unit base parts, magnets (6), adjustment screw, spacer, E-ring ■ Precautions (Please be sure to check) About Specification Updates: This product is constantly being improved, so the shape of the product delivered may differ in detail from the photos (it will be a higher-grade compatible product). Please note. Production Specifications: Due to being 3D printed, unique layer marks and fine burrs may occur, and there may be individual differences in color depending on the material used. Disclaimer: We are not responsible for any damage, breakage, or malfunction of the reel caused by the use of this product. Please install and use at your own risk.