Century Drill and Tool 10206 Finishing Contractor Series Circular Saw Blade, 7-1/4-Inch by 40T Blue coat surface treatment resists heat and build-up for a longer blade life C3 micrograin carbide teeth resists wear in the hardest wood for a longer blade life Fully hardened blade body with heat expansion slots and vents resist warping during tough cutting applications Smooth cross cuts in all types of wood Universal arbor