PORTER-CABLE 12830 Riptide 7-1/4-Inch 48 Tooth ATB Metal Cutting Saw Blade with 5/8-Inch and Diamond Knockout Arbor for Blade-Right Saws Cuts metal; fine-grained tungsten-carbide tips Computer-mapped cooling vents to maintain trueness Thin-kerf design reduces drag on motor Cuts metal; fine-grained tungsten-carbide tips Computer-mapped cooling vents to maintain trueness Thin-kerf design reduces drag on motor Non-warping design 5/8-inch arbor