The Penile Aide increases both penis length and girth by using traction, from its spring loaded steel rods, to assist the bodys natural ability to change and develop under physical influence. If you subject the penis to constant stretching the cells will begin to divide and multiply, thus increasing tissue mass. Note: The standard rods give a top length of 5 inches. If you wish for more stretching, add the extension rods which can stretch the top length to 7.5 inches.