DEWALT DW5816 7/8-Inch by 16-Inch by 21-1/2-Inch 4-Cutter SDS Max Rotary Hammer Bit

Amazon.com The DW5816 SDS Max Rotary Hammer Bit handles the toughest concrete, stone, and other masonry materials with ease. Its Rock Carbide tip extends bit life much longer than other bits, and its tough steel construction makes this hammer bit durable and long-lasting. The DW5816's open head design helps channel dust and debris into the flutes for more efficient drilling, and the helix four-flute construction removes this debris from the drilling surface quickly for easier drilling. This bit measures 7/8-inch in diameter, 16 inches usable length, and 21-1/2 inches overall length. From the Manufacturer DeWalt SDS Max bits are used primarily for drilling holes in concrete, rock, artificial stone, and other masonry materials. Common applications include drilling holes for mechanical anchors and holes for installing pipe and conduit.