The DEWALT Cordless Extreme Framing Circular Saw Blade has a thin kerf (cutting width) to ensure that less push force is required by the user and that they cut straighter with reduced binding. The durable teeth stay sharp for a long time with reduced breakage. Suitable for ripping and cross-cutting natural timbers and cutting composite wood based sheet materials e.g. Plywood, MDF and chipboard. NOT recommended for timbers that contains nails. The DEWALT DT10640QZ Cordless Extreme Framing Circular Saw Blade has the following specifications: Blade Diameter: 165mm.Bore Size: 20mm.Tooth Count: 40.