CONSTANT PITCH TYPE; METAL, NON-METAL, FERROUS METAL CUT MATERIAL; BI-METAL BLADE MATERIAL; 1 INCH DIAMETER; 350 RPM (MILD STEEL), 175 RPM (STAINLESS STEEL), 175 RPM (CAST IRON), 470 RPM (BRASS), 525 RPM (ALUMINUM) SPEED RATING; V TEETH TYPE