It is just a piece of pvc pipe heated with a heat gun until it is soft enough to be slid over the nut. Once it cools it will harden and can be used to unscrew the plastic nut.
It is just a piece of pvc pipe heated with a heat gun until it is soft enough to be slid over the nut. Once it cools it will harden and can be used to unscrew the plastic nut.