The Pro-Wheel Mandrel Replacement Screw is a precision machined thumb screw for use with the Pro-Wheel Mandrel, or with a standard mandrel. The screw is equipped with a:
- Knurled thumbscrew to simplify mounting and dismounting wheels
- Beveled face to ensure that wheel centers properly on the screw shaft.
The Pro-Wheel Mandrel screw fits most brands of pinewood derby wheels, however, some wheels are equipped with a wheel bore that is slightly smaller then the mandrel screw. The Pro-Hub tool can be used to ream out the wheel bore so that it fits on the screw.
- Material – Precision machined, zinc-plated steel
- Thread size – #3-48 (fits both the Pro-Wheel Mandrel and the Standard Mandrel)