Heat treated steel body, High frequency brazed tungsten carbide teeth, Expansion slots that reduce vibration, sound, and heat generation, Alternate chamfering: the saw alternates one tooth to the right and one to the left, High-frequency welding that provides 50% more peel resistance, For use on circular saw, Ideal for construction woods, cross, longitudinal and quick cuts. Diameter: 8 1/4" (209.5 mm), Center Bore Size: 5/8" (16mm), Teeth: 40, Maximum Speed: 7,500rpm