* FC-AT300 chainring hardware; replaces FC-SR100* Fits all 2011-2014 Athena, Centaur and Veloce Power Torque cranksets* Also fits 2009-2011 Super Record, Record and Chorus Ultra-Torque cranks* Includes 4 nuts, 4 bolts, 1 hidden bolt and 1 spacer* Compatible only with non-threaded chainrings