Lee Large Series Dies are designed to reload today's largest cartridges. They are threaded to fit Lee presses that accept 1 1/4" x 12 TPI threaded dies. Lee Full Length Sizer Dies are built to last a lifetime and are great at producing factory like ammunition. Lee Precision has been manufacturing high quality, affordable reloading equipment since 1958. The Lee Sizing die is no exception. These steel sizing dies require the use of a quality resizing lubricant. Die does not include shellholder.Special Note: The 1-1/4"x12 thread will ONLY fit in a Lee press.