Ed,
If your worried about killing someone with one, but like them anyhow.
Why dont you get a Boston Leather "Midget". Its abit lighter than a Denver, or Texan, and only 6"in long. So its even more easly concealed. I keep mine behind my walet. (just dont let it break your fall, if your riding a bike. I had a nasty bruse for a week)
The smaller size means you have to hit someone harder to get your desired results. Also, you dont need to hit them in the head. Hiting someone with the saps edge on the colar bone, or on the knee will hurt like no ones busness. Pluse its hard as heck to kill someone when your hiting them on the kneecap.
Sincerly,
Guido