I think they are called Batons now ?
Got me a few of the pocket size rubber stamps made ........”” MAGA ! “” and another that has “” TRUMP 2020 ! “” ......
A “sap” was always a heavy hard object (like a few rolls of pennies) instead a flexible, non-rigid container (like a thick athletic sock). Purpose made saps were leather pouches with lead weights sewn into them. Sean Penn putting 6 cans of soda into a pillow case was improvising an INDUSTRIAL SIZED sap that he used to turn the tables on two guys about to thump him in a scene from the movie Bad Boys made in the mid-80’s.