I have lots of hammers, but I have the craftsman hammer which is almost 11 years old. 1 year ago I polished it and put my own hand made handle in it. Recently, I was going to retire it. So, I picked up a new craftsman hammer about a month ago. I polished it and reshaped the handle. My old craftsman has a really narrow peen, the newer one is broader, and I reshaped the peen on the new hammer to be even more broad. Once I got the hammer to where it felt real good, I forged with it all day. It was easy to get used to. But, the next day as I was admiring it, I noticed a large flat dent on the corner of the face. I know that I had it polished really well, and I also know that I was drawing stuff out with some real force, but nothing as brutal as I have in the past. This dent was caused by drawing out using the edge. The newer craftsman hammer just isn't as hard as the old one. It is noticably different in stock form, and when I got it into shape for use, under the paint I can see the differential heat treat zones, but I think that I am going to have to remove the handle and heat treat it myself.