CARBON STEEL MATERIAL; 1-1/4 INCH MIN. HOLE SAW SIZE; 2-3/8 INCH MAX. HOLE SAW SIZE; 3/8 INCH SHANK SIZE; 18 TPI; 5/8 INCH THREAD SIZE; 1/4 INCH PILOT DRILL DIAMETER; YES SUPPLIED WITH PILOT DRILL; HEX SHANK SHAPE; CHUCK SIZE 3/8 INCH