Milwaukee 1/4"-28 NF Straight Flute Plug Tap and #3 Drill Bit Set is a comprehensive kit designed to provide precise and clean internal threading. This set includes a precision-machined Plug Tap and a matching drill bit, both crafted to ensure accuracy and reliability in threading tasks. The Plug Tap features a durable Black Oxide coating that excellent corrosion resistance, along with laser-etched sizing for long-lasting clarity. Its square shank design is compatible with standard tap handles or wrenches, making it versatile for various through-hole threading applications. I for use on metals such as brass, aluminum, and mild steel, this set delivers consistent performance, especially when used with cutting fluid to enhance threading quality and tool life. Model Number: 49-57-5530