WA24S - White Aluminum Oxide Grain – Stainless Steel. Ffor fast cutting of stainless steel, ferrous metals, food grade, and nuclear applications. Contains ≤0.1% iron, sulfur, or chlorine for rust-free and corrosion-free results. S-grade bond. Premium wheels made from superior raw materials and advanced technologies for longer working life. Ultra Wheels give consistent cutting action for quicker and easier working.