My breech plug removal tool (knight wolverine) has a hole in the end of it a little smaller than the diameter of a pencil. If/when mine gets stuck, I will WD40 or rem oil it as suggested above thenget one of the small, L-shaped allen wrenches, put the short end in the hole and tap/pound/bang on the longer end of the allen wrench. It will usually come out with a little "motivation". Let us know what you decide to use and how it works. Good luck, Greg