Cannondale Singled Sided Mountain Derailleur Hanger KF051/Cannondale Singled Sided Mountain Derailleur Hanger Kit includes one derailleur hanger, bolt, nut, and cable guide loop. You can use a 5mm hex wrench and chainring wrench with installation. Fits most carbon and aluminum mountain single sided rear derailleurs. Call for details. A brief list of bikes this is compatible: Rush, Prophet, Prophet SL, Rize, RZ (not 2011), Scalpel (second generation), Caffeine, F-Series, Taurine, Jekyll 2005, Gemini 2005+, Furio, Verso, Optimo, 2011 Adventure 2-3, and Misc. Tandems.680655275598