Hole Radius of Torus is the shortest line connecting the center of the Torus to the nearest point on the circumference of the circular cross-section of the Torus. And is denoted by rHole. Hole Radius of Torus is usually measured using the Meter for Length. Note that the value of Hole Radius of Torus is always positive. Typically, the value of Hole Radius of Torus is greater than 0.