Forrest STIF05 5-Inch Saw Blade Dampener and Stiffener with 5/8-Inch Arbor Forrest Sawblade 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 Can be removed instantly if need requires; Diameter: 5-Inch