Maximize your production on stock removal projects while minimizing cost with the Quantum3 SG CA Type 27 grinding wheel. The next generation Ceramic Alumina grain and bond system offer up to 2X the performance of competitive ceramic wheels, and an astonishing 500% or more increase in performance over aluminum oxide. Type 27 shape for Right Angle Grinders – Use on Carbon Steels & 400 Series Stainless Steel.