Shimano FC-R9100-P Dura-Ace Magnet Setting Tool For use with Shimano Dura-Ace FC-R9100 Power Meter 11 speed double chainsets. This magnet setting tool can also be used on the following chainset: – Shimano Dura-Ace FC-R9200-P – Shimano Ultegra FC-R8100-P These are an "A" match which indicates that the parts are the same in materials, appearance, finish & size etc. Genuine Shimano replacement part.