They say that two heads are better than one. However; we say three cock rings are better than one! You have your choice for whatever result you desire. The smaller ring is for maximum erections. The middle ring will produce a harder erection. You can place the large ring around the upper part of your scrotum to ward off premature ejaculation. Each ring is made from Elastomer which is a super-stretchy; comfortable & Phthalate-free material. This is a safe & hygienic way to improve size & stamina.