Tiger Depressed Center Wheel, Contaminant-Free Non-Loading Performance Line, 6 in Wheel Dia, 1/4 in Wheel Thickness, 7/8 in Center Hole, Arbor Connector, 24 Grit, Coarse Grade, Silicon Carbide/Aluminum Oxide Abrasive, Wheel Type Number: Type 27, 10200 rpm Maximum, Resin Bond, Applicable Materials: Aluminum, Wheel Hardness: R, Yes Reinforced.Fabricators know aluminum can be a challenging metal to work with because of its low melting temperature and tendency to load and stop cutting. That’s why Weiler designed a new line of cutting and grinding wheels that deliver a non-loading solution that maximizes cut rates, increasing productivity when working with aluminum. These wheels leverage a unique blend of abrasive grains and contaminant free additives that work to prevent loading, resulting in higher cut rates and long wheel life.