I have a 16lb sledge hammer and a 4oz finish hammer. They are both tools and happen to work quite well for their intended use. I sure would not want to even try to nail a #4 finish nail into a nice piece of walnut molding with that sledge. :shocked: Same thing applies to knocking out a 3" dia pin from a piece of heavy equipment. Sure would not want to even try to do that with a 4oz hammer.
It is always a good idea to do research on stuff, especially if it is going to cost you money and time.
Just my :2cents: