Forrest WW07Q307100 Woodworker II 7-1/4-Inch 30 Tooth 5/8-Inch Arbor 3/32-Inch Kerf Circular Saw Blade Forrest Saw Blades dampener helps kill saw scream-whistle from a vibrating blade surface. Dampen out motor and belt vibrations from being transmitted up to the rim of the teeth. Greatly reduce cutting noise. Hold blade rigid and true for better cuts on your machine. Are hardened and precision ground flat within .001" to keep your blade true.