Some balls I found

[omnicognic]

I have mentioned these in a few other posts, I finally got around to taking some pics. They are about three and a half inches across. The left one is a ceramic with a steel or iron core, the one on the right is solid steel. HH omnicognic 8)

 

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[omnicognic]

Hey yeah! I could say I found them near a crop circle! (I did find them in a field!)

 

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[dano91]

Could they be blast plugs? When they drilled holes and then put the charge in, and then plugged the hole with these balls to produce a better explosion. I remember using rubber ones in the 70's