so my daughter decides to do a science project about breaking glass. i have built an enclosure to test, but we lack the material to break the glass. i am looking for a giant steel, chrome, whatever metal ball. looking for 6" in diameter any machine shop guys fab one up or has one can use, it would be greatly appreciated. must be heavy and big enough to break regular, tempererd, and laminate glass. need something asap. and not expensive.
