I have one in a drawer somewhere, it is probably 50 years old. Mine is a lead weight in a leather handle, shaped like a spoon. Kept it under the seat of my car, when I was in high school. I heard they are illegal now.
I have 2 of those, homemade. I have others that attach to your keys or whatnot; fill the pouch with change from the slit in the top, and it isn't a weapon anymore, it is a change purse.