DT-Swiss RWS Plug In Thru Axles. Features: Up to 50% more clamping force than a common quick release Safe and easy to use: tighten up the system by turning the lever by hand and then remove for a clean, aero look on road or to avoid potential damage from rocks, etc. when on trails X-12 mountain version is specific to Syntace X-12 142mm system When not using removable ratcheting hex handle saves roughly 30g per axle Specs: Lever:alloy Shaft:aluminum Wheel:rear Spacing:12x142mm mountain Color:black Weight:72g