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 (1) M3x10 Socket Head Screw - Fastener Included - For 12x1.0 Thru-Axle (Double Lead) - Replaces Cannondale Part #K33009 Compatibility: - Cannondale SystemSix Carbon (with Speed Release Axle) - 2019 - Cannondale SystemSix HM (with Speed Release Axle) - 2019