DEWALT Diamond 7 in Grinding Wheel Impact Driver and bring a second footrest Specification Details Material Ceramic and bring a second footrest to your office to promote wellness and ease muscle aches A: High grade forged steel for durability Sub Brand N A Series Name N A Application Grinding Material Diamond Type N A Wheel Type Grinding wheel Grit N A Diameter (Inches) 7 Thickness (Inches) 1 Extended performance diamond matrix provides 350x's the life of conventional abrasives 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 Double rim provides longer life and more aggressive material removal