Silicone coat allows the blade to slice easier through material reducing pitch and resin buildup when cutting pressure-treated lumber. Construction-grade carbide teeth deliver longer blade life. Every other tooth is thinner for faster cuts. The innovative heat vent/expansion slot design reduces vibration for longer life and straighter cuts. Plate is fully hardened to run truer, longer. 20 tooth count blades are best for use with medium-thickness metals. IRWIN Tools MARATHON Carbide Cordless Circular Saw Blade, 6 1/2-inch, 20T (24021)
The IRWIN 24021 6-1/2" Marathon Cordless blade has an ultra thin kerf for more cuts per charge. The reinforced shoulder is for added durability and the aggressive hook angle gives you a faster cut. The Marathon has a fully hardened plate which will allow this blade to run truer longer. The tips are construction carbide and are face ground which will allow you to have a fast clean cut. Marathon is the true long distance runner.