Pinewood Derby Car Axles 100,000 Grit Optical Polish by Derby Dust&reg; Burrs are removed via lathe. 90 degree head formed. Axle is straightened using Derby Worx Pro Axle Press Head of the axle is shaped with a slight taper to reduce friction. Multiple wet sanding stages. Ensuring proper cleaning of axle between each stage of grit. 100,000 grit Polishing - Record Setting Speeds on our track! See our YouTube Channel: DerbyDust