As mentioned you need 2 punches, one as short as possible just to start it with and another just long enough to get it all the way out. The starter should be about .200" long and the finisher should be about 5/8-3/4" long. And remember, it has to come out top to bottom and installed bottom to top. The hole is not tapered but the top hole is a couple thousandths smaller than the bottom hole.