The super-smooth medical grade, phthalate-free silicone twisted model has a smooth pointed tip for easy insertion while the curls give extra stimulation to the urethra. The rounded knob allows safe and easy extraction. The super-smooth medical grade, phthalate-free silicone "nail" model has a smooth pointed tip for easy insertion and widens towards the end for extra stimulation. The rounded knob allows for safe and easy extraction. Always use with a generous helping of sterile water-based lubricant and insert slowly and incrementally for maximum pleasure.