DEWALT XP Extended Performance Diamond 4.5-in Cup WheelHigh diamond concentration for long life and aggressive material removal Large grinding segments with heat treated steel bodies which provides increases durability and wheel life Dry grinding of concrete and other masonry materials Also used for smoothing of uneven surfaces, double rim provides longer life and more aggressive material removal 4 1 2 in double row diamond cup grinding wheel blister Features Sub Brand NA Series Name XP Extended