<p>The Power Piston is both a vibrating masturbator and pump. Just slip your penis into the vagina opening, and use the Piston as a masturbater by sliding it on and off. Work the hand pump to create a powerful suction that will enhance a stiff erection. Then crank up the vibrator for added stimulation.</p> <p>Some men swear by the use of pumps as effective tools for increasing size while others think pumps have no lasting effect. Pumps can extend length while using, but the question is, will the penis return to original size after using? Unfortunately we do not have that answer and can not guarantee or be responsible for any results.</p>