The Penis / Cock Ring consist of three silicone o-rings that have a wire coil which allows you to control the tension by sliding it up or down. Simply slide the larger loop over the penis (only), hold the "pull tab", and adjust to your comfort level. The inside diameter of the lower loop is approx 2 1/2". The purpose of a penis ring / Cock Rings is to restrict blood flow to and from the organ after erection, technically strengthening the erection and making it last longer. Please see the second picture for explanation.

For her nipple rings, you control the size and the tension simply by sliding the coil to the desired size or tension, thereby stimulating the nipples resulting in sexual arousal. The dangling jewelry caresses the breast with each slight movement you make. A very erotic and sensual vision, leaving both "your" hands and "your partners" free to wander else where!