Perfect for heat-sensitive applications, the 48A AO Type 01 >4-inch toolroom wheel features a controlled porosity bond that maximizes coolant flow and reduces loading. The wheel has a long life span with its maximum grain retention and form holding construction. With its aluminum oxide abrasive, this Type 01 straight wheel gives consistent grinding action on tool steels. The wheel is compatible with CNC cutting tool machines and cylindrical and surface grinders, and withstands moderate to heavy feed rates.