This cock ring serves a dual sexual purpose: As a cock ring you can maintain your erection for a longer period of time (this happens because the cock ring regulates the amount of blood that flows away from your erection). Included with the cock ring is a vibrating bullet. When you turn it downward, the bullet will give your testicles a vibrating massage during intercourse. You could just wear the cock ring and let the bullet work your balls, while you're walking around the house, driving on the freeway or cooking dinner. Specifications: The cock ring is made of high quality leather. The cock ring measures 9" in length (when stretched out) and 1" in width. There are 3 snaps, allowing you to find your comfort zone while wearing this cock ring. At its widest setting, it can fit cocks up to 8" in diameter. Keep in mind that this cock ring goes at the base of the penis, so measure there.