The Circular Saw Blade Series 60 have anti-vibration slots reduce plate distortion. They also feature engineered expansion slots that prevent the blade from overheating and warping. In addition, the extra-large carbide tips can be resharpened up to 20 times. The Extreme DEWALT circular saw blade range have the following features:Teeth remain sharp for longer through use of extra-large sub micrograin carbide teeth;Exceptional surface finish due to unique anti-vibration slots that minimise blade vibration;Extended cutting life in difficult materials such as tropical hardwoods and MDF through use of corrosion resistant carbide teeth; Excellent blade to spindle fitting is provided by honed arbor holes. Specification Blade Diameter: 216mmBore Size: 30mmPlate Thickness: 1.8mmKerf Thickness: 2.6mmTooth Pitch: 28.3mmTooth Count: 24 Grind Geometry: ATB Rake Angle: -5 ° Series: 60