When top EWS Pro Riders ask you to develop a stiffer more durable fork axle, you listen. The stock 15mm axles and other lightweight aftermarket options were simply not tough enough for their race bikes.
We don't quite ride at the pace of an EWS Pro, but we loved the simplicity and clean look of the axle so we made them available to buy. Axle F is 98% stronger and stiffer than a stock 15mm axle, yet still 20g lighter than a QR.