CARBON STEEL MATERIAL; 9/16 INCH MIN. HOLE SAW SIZE; 1-3/16 INCH MAX. HOLE SAW SIZE; 7/16 INCH SHANK SIZE; 20 TPI; 1/2 INCH THREAD SIZE; 1/4 INCH PILOT DRILL DIAMETER; YES SUPPLIED WITH PILOT DRILL; HEX SHANK SHAPE; CHUCK SIZE 1/2 INCH