The Irwin General Purpose Table & Mitre Saw Blade with construction grade tungsten carbide tips that retain their edge for longer and are resharpenable. Expansion slots help to dissipate heat and prevent warping. The blades have a fully hardened plate that runs truer for longer and with more accuracy. They have an alternate top bevel (ATB) tooth grind for cross-cutting and ripping in all woods. Coated with a corrosion-resistant coating for increased, high quality performance. This Irwin General Purpose Table & Mitre Saw Blade has the following specifications: Blade Diameter: 315mm.Bore: 30mm.Teeth: 40.Kerf Thickness: 3.2mm.Tooth Config: ATB.Machine: Table & Mitre.