All Wheels Mfg. replacement derailleur hangers are produced in Colorado to exacting tolerances. - Replaces Norco Part #913015-003 - Attaches to frame with (1) M4x8 flat head screw (sold separately) - CNC machined 6061 aluminum - Black anodized finish - Note: This hanger is not the same as DROPOUT-274, which uses an M3 flat head screw