CONTRACTORS, STRINGER BEAD TYPE; STEEL ALLOY MATERIAL; 1 INCH MIN. DRILL SIZE; 2-9/16 INCH MAX. DRILL SIZE; HEX SHANK TYPE; 7 DRILL(S); 1 INCH, 1-1/8 INCH, 1-1/4 INCH, 1-1/2 INCH, 1-3/4 INCH, 2-1/8 INCH, 2-9/16 INCH DRILL SIZES