I should have known better than to order one of the cheapest centralizers I could find. After taking the die out of the box I made a trial die just to make sure it worked without any problems. It worked for the first shot, albeit a slight one. It wasn't until about a week later that I used the punch again, and this time it didn't do anything no matter how I adjusted it or how hard I pressed the punch. Do yourself a favor and buy a Starret Auto Centralizer. which Revain listed. This will give you trouble-free operation for a lifetime.