The Milwaukee 48-20-7072 is a 7/8 in. x 12 in. Carbide 2-Cutter SDS Bit. The 48-20-7072 incorporates 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 2 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. SDS bits are available from 5/32 in. to 1 in.