UNIVERSAL FLAT TYPE; CARBON STEEL MATERIAL; 3/8 INCH MIN. DRILL SIZE; 1 INCH MAX. DRILL SIZE; FLAT SHANK TYPE; HEAT TREATED PROCESS; 6 DRILL(S); 1/2 INCH, 3/4 INCH, 3/8 INCH, 5/8 INCH, 7/8 INCH, 1 INCH DRILL SIZES; OVERALL LENGTH 6"