Check the listing for details. "138-TA-01-F4 ADVENT MULTI FLUTE REPLACEABLE THREAD MILL" Just Mill No Threads". Condition: New. Listed at 110.00 USD. The 138-TA-01-F4 Advent Multi Flute Replaceable Thread Mill is a high-quality tool designed for CNC machining and metalworking. This product includes new inserts and six extra inserts, ensuring that you have spares on hand for when you need them. The replaceable inserts make it easy to keep your tool sharp and efficient, saving you time and money on maintenance. Ideal for precise and accurate threading, this thread mill is a reliable companion for any metalworking project.