Series 20™ Construction blade features ultra-thin kerf for fast cutting. Anti-stick rim reduces friction and gum-up.Blade Use Fast Wood Cutting Blade Diameter (in.) 6 1/2 Arbor Size (in.) 5/8 TPI (Teeth per Inch) 18 Tip Type Carbide Anti Stick Rim Yes Series Number 20 Blade Speed (RPM) 7,000 Blades (qty.) 1