Incorporating the industry standard shank for carbide drilling bits, Milwaukee's SDS bits have carbide vacuum brazed to heat treated steel shanks ; The sharpened angle of the carbide creates two cutting edges ; The flute of the bit is designed for fast removal of the concrete dust from the hole, aiding in more efficient drilling of small holes ; 1/2'' diameter, 2-cutter head ; SDS shank ; Drilling depth 16'' and overall length 18''