1973 DiamondStone Electric Knife Sharpener
McGowan’s Firestone / DiamondStone knife sharpeners make it easy to sharpen kitchen knives, utility knives and sporting tools. Made from a blend of aluminum silica and ceramic and diamond, our knife sharpeners provide the perfect sharpening surface. Both sides of your knife are sharpened simultaneously, creating a hollow ground edge. Knives have never been so sharp – and sharpening has never been so easy!