This is a wonderfully simple, innovative toy which can be used for couples or as a masturbation enhancer. The five rows of chrome-look balls rub gently up and down the shaft when stimulated, restricting blood flow back to the body and helping you to keep your erection at the same time as rubbing you in all the right places! Used as a couples toy, these little rolling balls feel fantastic against your partner, you'll be hard pushed to find something in the price range that feels this good!