Removing an old cork is not always easy. Some installers may have used a little glue when installing the cork, and some corks can be extremely tight.If you are not confident removing your existing stopper or cork, please see your local repair person. You can damage your headjoint by using too much force or a bad removal technique.The tool included with the swap-stopper allows you to push out a cork, from the crown end down through to the tenon end. The tool is deliberately made of plastic,. to avoid causing damage. However, it is not suitable for extracting stuck or stubborn corns. Specialist equipment and techniques will be used by your repair person to do that.