The Milwaukee 17-Piece Metric Tap and Die Set include precision machined threading accessories and threading handles for the most common applications. The Taps and Dies feature long-lasting laser-etched sizing for the clearest markings and include a protective Black Oxide coating for corrosion resistance. The Plug Taps square shank is compatible with all standard tap handles or tap wrenches and is designed for through-hole threading. The Hex Dies 1 in. hex shape is compatible with the MILWAUKEE Hex-LOK 2-in-1 Handle (sold separately), as well as all standard 1in. Hex Die stocks. The set includes accompanying drill bits for pilot drilling and is designed for use with drill drivers. The Taps and Dies are designed for cutting threads in the most common metal applications including brass, aluminum, mild steel, and more. For best results, use with cutting fluid.