The DEWALT DT99561 Xtreme Runtime FlexVolt Circular Saw Blade, developed as a high performance blade that delivers fast and accurate cuts in heavy-duty applications. Perfectly suited to the cutting of large and thick timbers and various other site materials. Its extreme runtime design provides the blade with twice the working life span of its market competitors. Ideal for the Dewalt Flexvolt DCS520T2 / DCS520NT Plunge Saw Features and Benefits: Engineered to maximize runtime Submicron grade carbide teeth for long life Patented body slot design for smooth cuts Thin kerf design for smooth, efficient cuts For use with XR FlexVolt range and all compatible corded and cordless circular saws, mitre saws and table sawsOptimized for cordless with up to 2x more cuts per charge Includes X4 Blades