This set of Toynary cock rings are very Strong! Made of medical grade pure silicone, they are safe, stretchy, silky smooth and durable. The set comes with 2 rings, one single ring and one double ring, both have a special pointy design to reduce pressure on user's urethra, providing extra comfort at that special moment. There are several combinations to use CR02, either use the rings individually or both at the same time, putting onto the bottom of the penis or wrap around the balls etc.