The Milwaukee 48-20-4076 model 3/4inch X 16inch Spline Bit (2-cutter) is a part of the Spline Bit Series. This comes with a 3/4inch X 16inch drill bit. This bit lets maximum transmission of the energy from the Hammer to the Bit. It's composed of superior quality carbide that are vacuum brazed to a heat treated steel body, resulting in two cutting edges which pulverize the concrete as the bit turns and pounds the work surface.