Our 20mm quick release front axle, is accuratelly CNC machined, out of aircraft grade aluminum, and it is hard anodized in black, for a slip fit with the spindle housing. It has alloy caps and a ChromeMolly skewer. Our quick release axle, is the best solution for cantilevered axle hubs on trikes, because of its light weight, strength and stiffenes. The quick release lever makes removing wheels a breeze, simply by unthreading the axle, sliding the alloy body out and the wheel is free. It also avoid any need of tools and it always assure a snug pressure on the front wheel. It will fit all Catrikes years 2004 to present. Sold by the unit; Needed two per trike. It replaces our old part hollow alloy axle with the aluminum hollow nut, because of the simplicity of the new quick release system.