Tungsten Carbide grit hole saw Carbide Grit Hole Saws ideal for cutting ceramics, fiberglass, hardwood, cast iron, composite CARBIDE GRIT HOLE SAWSThe long-lasting choice ... resistance to heat, wear and abrasion with shock resistant back.Tungsten carbide grains are bonded to alloy backs with a gulleted, snag ... 3/8"86mm105050953-3/4"95mm105051024"102mm105051144-1/2"114mm Tungsten Carbide Grit Hole Saw