This classic circle shape has an additional knob that applies pressure behind the scrotum for an ultimate climax. Rock Solid cock rings enhance size and thickness for longer, harder erections, and are completely body-safe. • Soft, Stretchable Silicone • Delays Ejaculation and Prolongs Erection • Enhances Size and Thickness • Easy to Clean • Top Rack Dishwasher-Safe • Hypoallergenic, Nonporous, and Odorless • Phthalate-Free, Body-Safe