This Diablo blade 7-1/4 inches in diameter with 4 teeth generates up to 50% less respirable dust*, while delivering the longest life in all fiber cement materials. The laser cut thin kerf design gives fast and precise cuts with less dust and waste. The anti-vibration design stabilizes the blade and reduces noise while cutting and Non-Stick Perma-Shield coating to reduce heat. Provides up to 75 times longer cutting life compared to standard carbide blades