Bosch 95418 Black Oxide Carbon Steel Plug Tap 12/24 Size #16 - 5 Pack Recommended for use after the threads have been started. 1-3 chamfered threads at the tip are enough to start the hole and taps all the way to the bottom. Heat-treated carbon steel provides long life and clean, accurate threads. Black oxide coating provides corrosion resistance. This item is new in packaging. Packaging in good condition with potential signs of warehouse storage.