Milwaukee 1/4"-18 SAE Straight Flute Plug Tap and Drill Bit Sets include a precision machined Plug Tap designed for creating or repairing clean, accurate internal threads. These sets come with the corresponding drill bit for piloting, making them i for through-hole threading. The Plug Taps feature long-lasting laser-etched sizing for clear markings and a protective Black Oxide coating that provides corrosion resistance. Their square shank is compatible with all standard tap handles or tap wrenches. Engineered for durability, these MILWAUKEE® Straight Flute Plug Taps are for cutting threads in common metal applications such as brass, aluminum, and mild steel. The drill bit is designed for use with drill drivers, and for results, it is to use these Plug Taps with cutting fluid. Model Number: 49-57-5591