DeWALT DW4528 High Performance, Type 27 Grinding Wheel, 7/8 in Arbor,

Designed for grinding concrete; cast iron; ductile iron; and other masonry materials. High grain concentration for agressive grinding action and smoother running wheel. Proprietary wheel design. 3 full sheets of glass in every 1/4″ wheel and 2 full sheets in every 1/8″ wheel.