Disston E0104584 2-1/2-Inch RemGrit Carbide Grit Arbored Hole Saws 64mm The product is 2-1/2" 1PC Hole Saw Easy to use The product is manufactured in United States Cuts extremely hard abrasive materials Cutting edge of tungsten carbide particles bonded to alloy steel back High heat and abrasion resistance, no teeth to dull or chip, resists snagging and smooth cutting