684004. Carbide Tipped Combination Ripping and Crosscut 8 Inch Dia x 40T 4+1, 15 Deg, 5/8 Bore. Where one blade must do almost everything ripping and crosscutting hardwood and softwood, cutting plywood this blade is a good choice. It is in the traditional combination-blade configuration, with a flat-top tooth and 4 alternate top bevel teeth in groupings of five. The large gullets at the raker tooth allow deep cuts with improved chip ejection.