1. First, screw the self tapping screw into the wood a bit so that it can stand on the wood.
2. Then insert a ballpoint pen and steel ruler horizontally into the circle above the nail circle.
3. Hold the ballpoint pen and rotate it.
4. A ballpoint pen is equivalent to the diameter of a wheel, while the nail ring screw is equivalent to a shaft, and the diameter of the shaft remains unchanged.
5. Increasing the diameter of the wheel can make it easier to screw the nail ring into the wood.