Product Description Shimano mounting set SM-RT66 / SM-RT56 - hardware for 6-bolt brake rotors The Shimano mounting kit for SM-RT66 consists of six bolts and three locking plates. It is also compatible with the SM-RT56 6-bolt brake rotor. Compatibility:SM-RT66SM-RT56Manufacturer Number:Y-8KT98010 Contents:6 x Shimano fastening bolts3 x Shimano safety plates Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com