The blades have innovative heat vents, and the fully hardened plate runs truer for longer and with more accuracy. They have alternate top bevel teeth (ATB) for cross cutting and ripping in all woods. Suitable for use with handheld corded machines. Specifications: Blade Diameter: 165mm. Bore: 20mm. Teeth: 40. Kerf Thickness: 1.8mm. Tooth Config: ATB.