The U-Plug EX Hard is made specifically for experienced users of penis plugs who aren't satisfied by regular urethral stick play toys. The metallic material feels nice and cool as soon as you insert it, while the size provides incredible stimulation. Choose the Sting version for smooth insertion, while the Skeleton option is better if you want to feel several bone-like rings as you insert it. The position can be adjusted and fixed with the rubber ring that is included in two sizes.