This lockable expansion plug allows you to open it inside your partner's anus and then secure it. Insert the smooth, hard plug in its closed state into their hole. Once it is fully inserted, pull back on the stem that protrudes from the base. The three prongs inside your toy will bloom and stretch their anus. Once the stem is retracted enough to create an opening, insert the closure to keep the plug open. This plug is made of stainless steel, is non-porous, and phthalate-free. Use it with a lubricant of your choice. Clean thoroughly with soap and warm water after each use.