3-1/4", 30 Grit Diamond, T-Shank, Jig Saw Blade, For Hard Tile Clean Cutting In Grade 5 Porcelain, Granite & Marble, Slate, Glass & Cement Board 3/64" To 1/2", 30 Grit Diamond Matrix Bonded To Blade Edge Cuts The Hardest, Most Abrasive Materials, Ideal Solution For Professional Tile Installers & Other Specialized Trades.