Oldham 450C418 4-1/2 18T Max Life Contractor Superduty Carbide Blade Blade specifically designed for use with cordless saws, to provide more cuts per battery charge Designed with minimal kerf thickness to cut fast, with less drag Razor Smooth Tips, made of tungsten micro grain carbide, provide high impact resistance and cut fast and clean Blade specifically designed for use with cordless saws, to provide more cuts per battery charge Designed with minimal kerf thickness to cut fast, with less drag RazorSmooth Tips, made of tungsten micrograin carbide, provide high impact resistance and cut fast and clean Optimal plate thickness to achieve fast cutting while retaining plate stiffness for accurate cutting Fully flattened plate for easier cutting, less resistance