Pumping shouldn't take two arms! The One-Armed Bandit is not only super powerful, but super easy to use. Just slide the soft comfortable grip donut over your cock and down to the base. When you have the vacuum pump where you want it, use the hand pump with two finger pull to provide the perfect amount of suction for enlargement. When you are ready to release the pressure, press the release valve on the hand pump and remove the plastic cylinder from your member. Plastic cylinder measures 3.25in in diameter and 8in long. Outlaw clumsy penis pumps that need both hands to operate and demand the One-Armed Bandit!