25mm Deluxe Flexpruf Solid Steel Axle is made out of extremely tough steel. Snap ring end (no step). Two keyways (1/4″) are offset 180 degrees for stress relief, balance and unrestricted positioning of brakes, bearings and hubs. Brightly plated and poly-wrapped for protection. Axle diameter is 25mm, overall length 40″, shoulder to shoulder is.