The fact is, almost any new knife can cut through an aluminum can and then slice a tomato with equal ease. Don’t believe me, buy a new cheap knife and try it yourself. The pitch man hacks through a tree branch. He cuts a radiator hose. And this ho-hum humbug works. If he hammered a nail with his shoe people would buy nine pair, as long as they came with a free shoehorn and an extra pair of laces.