DEWALT DW4765 4-1/2-Inch Porclean Tile Blade Wet/Dry Extended performance diamond matrix provides long life and enhanced material cutting Continuous rim design provides chip free cutting in all types of tile XP2 and XP4 blades designed specifically for high power tile saws, allowing quick, free, low heat, and straight cutting XP2 and XP3 blades with laser cut expansion slots eliminate blade warping due to heat build-up Premium XP2 and XP4 cutting matrix means XP2 gives 2 x's the life of standard blades, XP4 gives 4x's the life of standard blades;