Reed knows how to cut a good thread and high speed steel (HSS) R12+ Segmental Dies show this with cutting edges manufactured in-house by precision CNC machinery. The segmental die design enables smooth chip flow and easy cutting. R12+ Segmental Dies are replaceable parts for Reed R12+ Dropheads, as well as the following Ridgid ® dropheads: 12-R, 00-R, 111-R, 0-R, 11-R, 30A and 31A threaders. Segmental dies are sold in full sets of four numbered dies. Use with Reed Threadguard Cutting Oil for better and faster threads and longer die life.