I believe that they cannot be removed as you have to installe the molly expander. I know there are cretain things you can do to them to tighten them if they become loose or slip, but I think they are one and done. I have not removed one from any of the about 50 balls I have drilled last season. A couple have changed hands from person to person and if the person did not want the IT, I either drilled out the ball-it and plugged it, or i just installed a new slug into the sleeve and drilled out the new slug.
