I know what you are saying about weight, I feel confident in swinging a 10 without any trouble for a while.

Genuine second growth American Hickory moisture controlled, machine-gauged to precise dimensions for a perfect fit with weather-resistant clear lacquer finish. I used every thing from the one handed sledge hammer, '4 pounder', to the heavier 20 lb sledge hammer.

The energy argument seems right until I use something heavier and the mass/inertia just seems to take care of the job. I'm actually shocked there hasn't been a post yet from someone claiming to have easily used a 20 pounder when they were in kindergarten or some such nonsense. Groz Indestructible Handle Hammers meet ANSI specifications "Hand Tools - Heavy Striking Tools Safety Requirements", as well as BS 876 specifications for material, hardness and performance. I'm pretty sure I would tire of swinging a 20lbs in around 10 or fewer swings, and I work in a fairly physical job. That said, I’m 6’3” and a bit overweight at mid 230s, I would not recommend this product for those smaller in stature.

As America's leader in industrial workholding equipment and striking tools for more than 80 years, Wilton Tools has a reputation for quality, durability and reliability that is unmatched by any other brand. Wilton Tools 22030 BASH sledge hammer is designed for use in demolition, construction and heavy-duty tasks. I am looking to replace a couple of China no name sledge hammers that I sent off to the auction the other day. This 20 lb sledge hammer has a long handle and a large flat head to deliver powerful blows to concrete, wood and steel.I laughed and handed it to my wife (who is much smaller) and she could barely lift it over her shoulder. I owned a 10 pounder when I was a six-two, 275-pound weightlifter, and swinging that thing from over my shoulder for more than ten minutes forced me to take a long break a catch my breath. I can't see any place a 20 lb hammer fits into automotive work unless maybe your working on the 200 ton coal mining dump trucks.