I received multiple pm's regarding the spammer. I do not have the time to make them for others, but i will tell you what i did.
Start with a 15" spud crescent or tool of your choice. The kobalt version at loews is about 1/3 cheaper then the crescent version, if your rich, you can get the Klein version, anyway, notch a piece of 1/2 material to fit the crescent head as not to impede the mechanism. Tig weld this to the wrench. Sacrifice a cheap hammer head. My first one was a head from a Hart finish hammer that one of the claws broke on. I had a friend notch a rabbit in the hammer head 1/2 deep and 1/2 wide, this then gets installed on the plate that was welded to the wrench. welded the head on the wrench 90 degrees to the handle.
I originally came up with this when was racing stock full dodge trucks in baja. We would constantly break control arms and the control arm bolts on dodge trucks are different size top and bottom { i have no idea why } This tool let me loosen and tighten the control arm bolts, the spud was good to line up the holes to install them, and the hammer would pound them into place. win win. Then everyone who saw it wanted one.
If you mill the hammer head, be very careful, as tool steel is very hard and we shattered one bit in the process, can you say scary.
So that is how to make your own spammer.