Milwaukee 1/4"-20 NC Straight Flute Plug Tap & #7 Drill Bit includes a precision machined Plug Tap designed for creating or repairing clean and accurate internal threads. This set features a long-lasting laser-etched sizing for clear markings and a protective Black Oxide coating that excellent corrosion resistance. The Plug Tap’s square shank fits all standard tap handles or tap wrenches and is engineered for through-hole threading. Built for durability, these taps are i for cutting threads in common metals such as brass, aluminum, and mild steel. The included drill bit is designed for use with drill drivers, making this set versatile and efficient. For optimal performance, it is to use the Plug Taps with cutting fluid. Model Number: 49-57-5534