All Wheels Manufacturing replacement derailleur hangers are produced in our Colorado shop to exacting tolerances. - CNC machined 6061 aluminum - Black anodized finish - Attaches to frame with a special low flat head screw M6-1.0 (RockyMountain part #180487-010) - Fastener not Included - For Thru Axle - Replaces Rocky Mountain Part #1092020 (Hanger #9)