UA SAIT Pro Cut-Off Wheel, Type 1 Portable Reinforced, Series: SAIT Pro, 12 in Wheel Dia, 1/8 in Wheel Thickness, 20 mm Center Hole, 24 Grit, Coarse Grade, Silicon Carbide Abrasive, 6300 rpm Maximum, Resin Bond, Applicable Materials: Concrete, Stone, Brick, Soft Aggregate and Masonry, Wheel Type Number: Type 1, For Use With: Portable Saws, Yes ReinforcedType 1 shape for square, burr free cuttingExternally reinforced with the highest quality fiberglass to withstand the toughest applications