7/16 INCH WIDTH ACROSS FLAT; 1-1/8 INCH MIN. HOLE SAW SIZE; 1.125 MIN. HOLE SAW SIZE - DECIMAL; 1-1/8 MIN. HOLE SAW SIZE - FRACTIONAL; 20 TPI; 1/2 INCH THREAD SIZE; HEX SHANK SHAPE; DOUGLAS. BRAND; FOR HOLE SAW D2V-18; FOR HIGH SPEED DRILL