3/8 INCH WIDTH ACROSS FLAT; 7/8 INCH MIN. HOLE SAW SIZE; .875 MIN. HOLE SAW SIZE - DECIMAL; 7/8 MIN. HOLE SAW SIZE - FRACTIONAL; 20 TPI; 1/2 INCH THREAD SIZE; HEX SHANK SHAPE; DOUGLAS. BRAND; FOR HOLE SAW D2V-14; FOR HIGH SPEED DRILL