Andropenis is a traction device that is designed to permanently increase the length and girth of the penis and also correct curvatures due to Peyronie’s Disease. It works by exerting a traction force of between roughly one to three pounds on the penis. Over time, this stretching spurs the growth of additional penile tissues. Andropenis can increase penis length by 1.6 inches, boost girth by 0.6 inches, and correct curvatures of up to 40 percent. There are links to scientific journal articles supporting the effectiveness of this method of penis enlargement.