Cleaning out my Mom's house I came across these 2 cast iron balls. The one on the left measures 2.5 inches the one on the right measures 2.9 inches. As a kid on of my older brothers told me they were cannonballs, not sure why my Mennonite ancestors would have had cannonballs but I'm not sure what else they might be. So I'll ask you guys, are these cannonballs.