CONSTANT PITCH TYPE; METAL, NON-METAL, FERROUS METAL CUT MATERIAL; BI-METAL BLADE MATERIAL; 6 INCH DIAMETER; 65 RPM (MILD STEEL), 30 RPM (STAINLESS STEEL), 40 RPM (CAST IRON), 85 RPM (BRASS), 90 RPM (ALUMINUM) SPEED RATING; V TEETH TYPE