Union Butterfield TN1785 High-Speed Steel Spiral Point Tap, TiN Coated, Round Shank With Square End, Plug Chamfer, M5-0.8 Thread Size Spiral point tap pushes chips ahead of tool to reduce clogging Spiral point with straight flutes for cutting threads in through holes Titanium nitride (TiN) coating combines hardness with low friction for extended tool life and faster cutting Relieved-style design reduces friction between tap and workpiece for reduced tool wear Plug chamfer for easier starting and correct perpendicular alignment