I'm on my second Mac Tools 32oz ball peen dead blow. The first lasted over 20 years and eventually failed because the plastic dried out enough that it cracked badly. Mac's warranty covered it, but they required me to ship it to them, so it cost me a few bucks. That said, I don't reach for that hammer when I want to use impact to break things loose. I've found a 32oz non-dead blow hammer to work better. My theory, which is just that - a theory, is that you want the highest impulse force you can get in that case, and a dead blow is designed to impart more total energy, but the peak force is less. Has my thinking been wrong all these years? (honest question)