Differently to classical silicone ones, these rings are made of safest Elastomer. Instead of classical o-shape with smooth circumference, the toys are made in more advanced industrial design that reminds gears of some mechanism. And in this case this mechanism is you perfectly hard boner, prolonged sexual act, sensual touch and stimulation and safest experience with no allergy or stress for skin. You can use one ring alone or both rings together in different parts of the penis. Nutz are as perfect as the sexual life you deserve, so just try them to know what male orgasm may feel like with sex gear!