This blade is the classic Ripper for both hardwood and softwood. It features the flat-top grind for cutting with the grain efficiently; ample gullets for fast chip-clearance; expansion slots and turbulence-reducing copper plugs. The new blade with the 20° hook angle Features a thicker plate and cuts a wider kerf. Use in single and gang-rip saws, #618320, (D) diameter: 18 (450mm), teeth: 32, (D) bore: 1, tooth grind: ft, hook angle: 20°, kerf (B): .157 (4.0mm), Plate (C): .110 (2.8mm), 618320 carbide Tipped ripping standard 18 inch dia X 32T ft, 18 deg, 1 inch bore