VARIABLE PITCH TYPE; STEAM OXIDE FINISH; FERROUS METAL, NON-FERROUS METAL, NON-METALLIC CUT MATERIAL; BI-METAL BLADE MATERIAL; 1-3/4 INCH DIAMETER; 195 RPM (MILD STEEL), 130 RPM (CAST IRON), 260 RPM (BRASS), 395 RPM (ALUMINUM) SPEED RATING