Century Drill and Tool 6460 Universal Shank Carbide Grit Jig Saw Blade, 3-5/8-Inch Used to cut ceramic tile cast iron thin masonry stone slate and marble Cutting edge of Tungsten carbide particles are bonded to an alloy steel back High heat resistance with no teeth to dull or ship for greater wear resistance and a longer tool life Carbide grit blades never require resharpening